This document provides an overview of geology and related topics. It discusses that geology is the study of the Earth, including its composition and physical processes. Geology helps various engineering fields including civil engineering by providing information about site conditions. Some key topics covered include minerals, rocks, soil classification, and the relationships between geology and civil engineering in areas like planning, design, and construction.
Petrology
Definition of a rock, petrology. Classification of rocks-Geological classification of rocks. Rock Cycle. Classification of igneous Forms, structures and textures of igneous rocks. Classification of sedimentary rocks, and its structures and textures. Classification of metamorphic rocks, its structures and textures.
Megascopic Study of Granite, Dolerite, Basalt, Pegmatite, Charnockite, Sandstone, Shale, Limestone, Gneiss, Schist, Quartzite, Marble and Slate.
The document describes different types of rocks including igneous, sedimentary, and metamorphic rocks. It discusses their modes of formation and provides examples of common rock types within each category. It also describes common rock-forming minerals and their properties such as color, luster, hardness, cleavage/fracture, and special properties. Key minerals discussed include quartz, feldspar, calcite, biotite, chlorite, corundum, and others.
This document provides an overview of petrology, the scientific study of rocks. It defines different types of rocks, including igneous rocks formed by cooling magma, sedimentary rocks formed from compacted sediments, and metamorphic rocks formed by changes to existing rocks through heat, pressure, and chemical processes. It describes key concepts such as crystallization, dykes and sills which are rock intrusions, and the textures and structures of different rock types that provide clues to their formation histories. The document emphasizes that rocks have been essential to human civilization and the development of tools and materials throughout history.
The document provides an overview of geology and various geological concepts through definitions and explanations. It discusses the structure of the Earth, including the crust, mantle, outer core and inner core. It then covers plate tectonics, the geological time scale, minerals, rocks including igneous, sedimentary and metamorphic rocks, faults, folds, coal formation and some key geological terms. Diagrams and images are provided to illustrate geological features and concepts.
This document provides an overview of petrology, which is the study of rocks. It defines different types of rocks, including igneous, sedimentary, and metamorphic rocks. Igneous rocks form from the cooling of magma, sedimentary rocks form through the compaction and cementation of sediments, and metamorphic rocks form through changes to pre-existing rocks due to heat, pressure, and fluids. The document also discusses various rock properties like texture, composition, and uses examples to illustrate different rock types.
HYDROTHERMAL PROCESSES; Causes of deposition; Origin of Hydrothermal Fluids (or The Main Sources of Water in Hydrothermal System); The Main Steps in Hydrothermal Processes; Classification of Hydrothermal Deposits; Different Types of Hydrothermal Vein; Different styles of Hydrothermal ore deposits; Orogenic Hydrothermal Ore Deposits; Hypozonal: Orogenic, hydrothermal ore deposits; Epizonal:; Mesozonal
The document discusses soil profiles, soil genesis, and parent material classification. It defines a soil profile as the vertical cross section of soil horizons. Soil genesis refers to the evolution of soil from parent material, influenced by climate, organisms, relief, and time. Parent material is the geological material from which soil forms, and can be classified based on its mode of transportation (ice, water, wind, gravity) and degree of particle sorting. The document provides examples of different parent material types including glacial till, alluvium, loess, and residuum.
The document provides information about planetary systems and details about Earth. It discusses that Earth is an insignificant speck compared to the vast universe and galaxies. It then describes the solar system, including that Earth revolves around the sun in 365.25 days. It distinguishes between the inner terrestrial planets like Earth and the outer gas giants. It also discusses moons, asteroids, meteors, and comets. The rest of the document delves into specific details about Earth's atmosphere, lithosphere, hydrosphere, and biosphere.
Petrology
Definition of a rock, petrology. Classification of rocks-Geological classification of rocks. Rock Cycle. Classification of igneous Forms, structures and textures of igneous rocks. Classification of sedimentary rocks, and its structures and textures. Classification of metamorphic rocks, its structures and textures.
Megascopic Study of Granite, Dolerite, Basalt, Pegmatite, Charnockite, Sandstone, Shale, Limestone, Gneiss, Schist, Quartzite, Marble and Slate.
The document describes different types of rocks including igneous, sedimentary, and metamorphic rocks. It discusses their modes of formation and provides examples of common rock types within each category. It also describes common rock-forming minerals and their properties such as color, luster, hardness, cleavage/fracture, and special properties. Key minerals discussed include quartz, feldspar, calcite, biotite, chlorite, corundum, and others.
This document provides an overview of petrology, the scientific study of rocks. It defines different types of rocks, including igneous rocks formed by cooling magma, sedimentary rocks formed from compacted sediments, and metamorphic rocks formed by changes to existing rocks through heat, pressure, and chemical processes. It describes key concepts such as crystallization, dykes and sills which are rock intrusions, and the textures and structures of different rock types that provide clues to their formation histories. The document emphasizes that rocks have been essential to human civilization and the development of tools and materials throughout history.
The document provides an overview of geology and various geological concepts through definitions and explanations. It discusses the structure of the Earth, including the crust, mantle, outer core and inner core. It then covers plate tectonics, the geological time scale, minerals, rocks including igneous, sedimentary and metamorphic rocks, faults, folds, coal formation and some key geological terms. Diagrams and images are provided to illustrate geological features and concepts.
This document provides an overview of petrology, which is the study of rocks. It defines different types of rocks, including igneous, sedimentary, and metamorphic rocks. Igneous rocks form from the cooling of magma, sedimentary rocks form through the compaction and cementation of sediments, and metamorphic rocks form through changes to pre-existing rocks due to heat, pressure, and fluids. The document also discusses various rock properties like texture, composition, and uses examples to illustrate different rock types.
HYDROTHERMAL PROCESSES; Causes of deposition; Origin of Hydrothermal Fluids (or The Main Sources of Water in Hydrothermal System); The Main Steps in Hydrothermal Processes; Classification of Hydrothermal Deposits; Different Types of Hydrothermal Vein; Different styles of Hydrothermal ore deposits; Orogenic Hydrothermal Ore Deposits; Hypozonal: Orogenic, hydrothermal ore deposits; Epizonal:; Mesozonal
The document discusses soil profiles, soil genesis, and parent material classification. It defines a soil profile as the vertical cross section of soil horizons. Soil genesis refers to the evolution of soil from parent material, influenced by climate, organisms, relief, and time. Parent material is the geological material from which soil forms, and can be classified based on its mode of transportation (ice, water, wind, gravity) and degree of particle sorting. The document provides examples of different parent material types including glacial till, alluvium, loess, and residuum.
The document provides information about planetary systems and details about Earth. It discusses that Earth is an insignificant speck compared to the vast universe and galaxies. It then describes the solar system, including that Earth revolves around the sun in 365.25 days. It distinguishes between the inner terrestrial planets like Earth and the outer gas giants. It also discusses moons, asteroids, meteors, and comets. The rest of the document delves into specific details about Earth's atmosphere, lithosphere, hydrosphere, and biosphere.
1) The document provides notes on engineering geology and civil engineering prepared by Saqib Imran for students and engineers.
2) It defines engineering geology and discusses the effects of rock structure, composition, and climate on weathering. It also defines physical and chemical weathering.
3) The notes describe the geological cycle of rock formation, including the types of igneous, sedimentary, and metamorphic rocks. It discusses features such as texture and how intrusive and extrusive igneous rocks form.
This document summarizes key aspects of soil formation processes. It discusses how the variety of materials encountered by geotechnical engineers ranges from hard rock to soft organic deposits. Soil identification and evaluation of properties is important for analysis and design. The document then provides an overview of processes involved in soil formation, including weathering of rock, erosion, transportation, deposition, and post-depositional changes. It discusses the composition and structure of the earth's crust and continental plates. Rocks and minerals are broken down through these natural processes over geological time to form the variety of soil types.
This document provides a summary of earth materials including minerals, rocks, and geological processes.
It describes the basic components of minerals and how their physical properties like crystal form, luster, color, hardness, and cleavage can be used for identification. The main rock types - igneous, sedimentary, and metamorphic - are introduced along with the rock cycle. Sedimentary rocks form through weathering, erosion, deposition and lithification. Igneous rocks form as magma cools and includes volcanic and plutonic examples. Metamorphic rocks are formed from other rocks through changes in temperature and pressure.
Soil Forming Rocks and Minerals ClassificationDINESH KUMAR
This document discusses the classification of rocks and minerals. It describes three main types of rocks: igneous, sedimentary, and metamorphic. Igneous rocks form from the cooling of magma, sedimentary rocks form through the accumulation and cementation of sediments, and metamorphic rocks form from alterations to existing rocks by heat, pressure, and chemically active fluids. Within each rock type are various sub-classifications. The document also examines the classification of important rock-forming minerals and describes their structures, weathering properties, and physical characteristics.
Weathering is the process by which rocks are broken down at or near the Earth's surface through physical and chemical processes. It is the initial stage of rock breakdown and erosion. The main factors that affect weathering are climate, topography, rock composition and structure, vegetation cover, and time. The principal agents of weathering are water, wind, gases, acids, gravity, and temperature variations. Physical weathering breaks rocks into smaller pieces through mechanical processes like thermal expansion and contraction or freezing and thawing of water. Chemical weathering alters rock minerals through hydration, hydrolysis, oxidation, carbonation, and solution. Biological weathering involves physical and chemical breakdown by organisms. Weathering forms a regolith mantle and produces
Rocks are naturally occurring solid mixtures of minerals or organic matter. They are classified based on how they form, their composition, and texture. Rocks change over time through the rock cycle. There are three main types of rocks: igneous, sedimentary, and metamorphic. Igneous rocks form from cooling magma, sedimentary rocks form through the compaction and cementation of sediments, and metamorphic rocks form from changes to existing rocks through heat, pressure, and deformation.
This case study analyzed clay occurrences around Kutigi Central Bida Basin in Nigeria. Detailed field mapping identified two hills near Kutigi town containing clay deposits. Laboratory analysis of samples from the hills using X-ray diffraction found them to be composed primarily of kaolinite and quartz minerals. Kaolinite alone constituted about 43.64% of the samples, while quartz constituted around 54.55%. This study characterized the geology and mineralogical composition of clays in this region of Nigeria.
- Weathering is the breakdown of rocks and minerals due to contact with water, air, and organisms. It occurs on site as opposed to erosion, which involves transport.
- Goldich's weathering sequence predicts that minerals formed under higher temperatures and pressures are less stable at the earth's surface than low-temperature minerals. The sequence follows Bowen's reaction series, with early-crystallizing minerals weathering first.
- The rate of weathering depends on factors like pH, temperature, surface area, competing ions, and fluid flow rates. Minerals with higher silicon-to-oxygen ratios are more resistant to weathering.
The document discusses the importance of geology in Indian rock monuments. It notes that various rock types were used for construction based on their availability, strength, and resistance to weathering. Over time, materials progressed from clay to wood to softer stones to harder stones as construction techniques advanced. The mineral composition and properties of the rock determined its resistance to physical and chemical weathering. Combined with climate and topography, weathering has destroyed or left many monuments in ruins over centuries. Understanding the geology is essential for conservation and using compatible stones for repairs.
Geography form 1 notes, kenya syllabusHamadySagiru
Geography is the study of the Earth. There are two main branches: physical geography, which examines landforms and climate, and human geography, which studies human activities and settlements. Geography relates to other subjects like chemistry, physics, agriculture, biology and history.
The solar system consists of the Sun and objects that orbit it, like planets, asteroids, comets and moons. The Earth originated from a cloud of gas and dust about 4.6 billion years ago. It rotates on its axis and revolves around the Sun, causing day/night and seasons. Internally, it has a core, mantle and crust. Geography involves understanding our planet and its relationship to other celestial bodies.
The document discusses the processes of weathering, erosion, and deposition. It defines weathering as the breakdown of rocks at or near Earth's surface, and erosion as the transport of weathered materials. The main types of weathering are mechanical (physical breakdown without chemical change) and chemical (chemical reactions that alter the composition of rocks and minerals). Key agents of chemical weathering include water, oxygen, carbon dioxide, acids, and temperature. Factors like climate, rock type, surface area, and topography influence weathering rates. Erosion is driven by forces such as gravity, running water, glaciers, wind, and ocean currents, which transport weathered materials and deposit them elsewhere.
This document provides an overview and introduction to a course on geotechnical engineering at Chinhoyi University of Technology. It covers topics like soil formation, properties of soils, soil classification, soil compaction and permeability. It discusses soil mechanics, different types of soils like residual and alluvial soils. It also explains concepts like weathering, clay mineralogy, basic structural units and types of clay minerals like kaolinite, montmorillonite and illite. The document is intended to help students understand the key principles and applications of soil mechanics in engineering.
The document discusses igneous rocks and their formation. It states that approximately 90% of the Earth's crust is composed of igneous rocks. Igneous rocks form from the cooling and solidification of magma. There are two main types of igneous rocks - extrusive and intrusive. Extrusive rocks form from lava at the Earth's surface during volcanic eruptions, while intrusive rocks form from magma that cools and crystallizes below the surface. Intrusive rocks include plutonic rocks, which form at great depths and have a coarse-grained texture, and hypabyssal rocks, which form closer to the surface and have finer textures.
Texture of Ore Minerals; Importance of Studying Textures; Individual Grains Properties; Filling of voids; Texture Types; Genetically differentiated between Texture types; Secondary textures from replacement; Hypogene Texture; Supergene Texture; Primary texture formed from Melts; Primary texture of open-space deposition; Secondary textures from cooling; Secondary textures from deformation; TEXTURES OF ECONOMIC ORE DEPOSITS; Textures of Magmatic ores; Cumulus textures; Intergranular or intercumulus textures; Exsolution textures; Textures of hydrothermal ore deposits and skarns; Replacement textures; Open space filling textures; Textures characteristic of surfacial or near surface environments and processes; Criteria for identifying replacement textures; Vein and Veining have different Nature Features
What is an ore?, Ore deposit environments, Formation of Mineral Deposits, Endogenous (Internal) processes, Exogenous (Surficial) processes, Types of Sedimentary Rocks, Mineral Deposits Associated with Sedimentary Process, physical processes of ore deposit formation in the surficial realm, Erosion, weathering , transportation, sorting, Precipitation, Depositional Environments, Deposits formed by Weathering, Deposits formed by Sediment, Resources from the Sedimentary Environments
The document discusses weathering, which produces the sediments that form sedimentary rocks. Weathering includes mechanical and chemical processes that break down rocks at Earth's surface. Mechanical weathering involves physical breakdown through processes like frost wedging and chemical weathering alters minerals through dissolution, oxidation, and hydrolysis. The rate of weathering is influenced by factors like surface area, rock characteristics, climate, topography, and differential weathering. Weathering produces sediments like clay minerals and dissolved ions that are transported and deposited, eventually lithifying into sedimentary rocks through the rock cycle.
This document provides information on different types of rocks and methods of extracting rocks and minerals from the earth. It discusses igneous rocks which form from cooling magma, sedimentary rocks which form through the compaction and cementation of sediments, and metamorphic rocks which form from changes to existing rocks through heat and pressure. It also describes surface mining techniques like open-pit mining and strip mining used to extract deposits near the earth's surface, as well as subsurface mining techniques like shaft mining used for deeper deposits. Factors that affect decisions around mineral extraction include the grade, size and value of deposits as well as costs of exploration, transportation and environmental impacts.
What is Geochemical distribution, Geochemical distribution of elements and factors affecting, Why to Study, Types of elements on basis of Geochemical distribution of elements, General Distribution Table, Associated Refrences
This document provides an introduction to petrology, including definitions and classifications of different rock types. It discusses the three main types of rocks: igneous rocks formed from cooling magma or lava, sedimentary rocks formed from weathered materials, and metamorphic rocks formed from changes to pre-existing rocks. It describes common textures and structures seen in each rock type, such as vesicular, columnar, and gneiss textures. Finally, it discusses the importance of petrology for civil engineering applications by providing details on rock properties relevant to strength and durability.
Igneous rocks are formed by the cooling and solidification of magma. They are classified based on their texture, mineral composition, and mode of formation. The three main types are volcanic, plutonic, and hypabyssal rocks. Common igneous rocks include granite, basalt, pumice, and diorite. Granite is widely used in construction due to its hardness, frost resistance, and high compressive strength. Basalt is used for building blocks, cobblestones, and insulation. Engineering considerations for igneous rocks include alkali-silica reactivity and using weathered rocks for foundations.
The document provides an overview of earth and life sciences topics including minerals, rocks, and the three main types of rocks - igneous, sedimentary, and metamorphic. It discusses how rocks are formed, classified, and the importance of studying rocks and minerals. It also summarizes the rock cycle and exogenic processes of weathering and erosion, describing the physical and chemical agents that break down rocks and how eroded materials are transported and deposited in new locations.
The document provides an overview of earth and life sciences topics including minerals, rocks, and the rock cycle. It discusses the three main types of rocks - igneous, sedimentary, and metamorphic - and how they are formed. The document also summarizes the processes of weathering and erosion, describing how physical and chemical breakdown of rocks is transported by agents and deposited in new locations.
1) The document provides notes on engineering geology and civil engineering prepared by Saqib Imran for students and engineers.
2) It defines engineering geology and discusses the effects of rock structure, composition, and climate on weathering. It also defines physical and chemical weathering.
3) The notes describe the geological cycle of rock formation, including the types of igneous, sedimentary, and metamorphic rocks. It discusses features such as texture and how intrusive and extrusive igneous rocks form.
This document summarizes key aspects of soil formation processes. It discusses how the variety of materials encountered by geotechnical engineers ranges from hard rock to soft organic deposits. Soil identification and evaluation of properties is important for analysis and design. The document then provides an overview of processes involved in soil formation, including weathering of rock, erosion, transportation, deposition, and post-depositional changes. It discusses the composition and structure of the earth's crust and continental plates. Rocks and minerals are broken down through these natural processes over geological time to form the variety of soil types.
This document provides a summary of earth materials including minerals, rocks, and geological processes.
It describes the basic components of minerals and how their physical properties like crystal form, luster, color, hardness, and cleavage can be used for identification. The main rock types - igneous, sedimentary, and metamorphic - are introduced along with the rock cycle. Sedimentary rocks form through weathering, erosion, deposition and lithification. Igneous rocks form as magma cools and includes volcanic and plutonic examples. Metamorphic rocks are formed from other rocks through changes in temperature and pressure.
Soil Forming Rocks and Minerals ClassificationDINESH KUMAR
This document discusses the classification of rocks and minerals. It describes three main types of rocks: igneous, sedimentary, and metamorphic. Igneous rocks form from the cooling of magma, sedimentary rocks form through the accumulation and cementation of sediments, and metamorphic rocks form from alterations to existing rocks by heat, pressure, and chemically active fluids. Within each rock type are various sub-classifications. The document also examines the classification of important rock-forming minerals and describes their structures, weathering properties, and physical characteristics.
Weathering is the process by which rocks are broken down at or near the Earth's surface through physical and chemical processes. It is the initial stage of rock breakdown and erosion. The main factors that affect weathering are climate, topography, rock composition and structure, vegetation cover, and time. The principal agents of weathering are water, wind, gases, acids, gravity, and temperature variations. Physical weathering breaks rocks into smaller pieces through mechanical processes like thermal expansion and contraction or freezing and thawing of water. Chemical weathering alters rock minerals through hydration, hydrolysis, oxidation, carbonation, and solution. Biological weathering involves physical and chemical breakdown by organisms. Weathering forms a regolith mantle and produces
Rocks are naturally occurring solid mixtures of minerals or organic matter. They are classified based on how they form, their composition, and texture. Rocks change over time through the rock cycle. There are three main types of rocks: igneous, sedimentary, and metamorphic. Igneous rocks form from cooling magma, sedimentary rocks form through the compaction and cementation of sediments, and metamorphic rocks form from changes to existing rocks through heat, pressure, and deformation.
This case study analyzed clay occurrences around Kutigi Central Bida Basin in Nigeria. Detailed field mapping identified two hills near Kutigi town containing clay deposits. Laboratory analysis of samples from the hills using X-ray diffraction found them to be composed primarily of kaolinite and quartz minerals. Kaolinite alone constituted about 43.64% of the samples, while quartz constituted around 54.55%. This study characterized the geology and mineralogical composition of clays in this region of Nigeria.
- Weathering is the breakdown of rocks and minerals due to contact with water, air, and organisms. It occurs on site as opposed to erosion, which involves transport.
- Goldich's weathering sequence predicts that minerals formed under higher temperatures and pressures are less stable at the earth's surface than low-temperature minerals. The sequence follows Bowen's reaction series, with early-crystallizing minerals weathering first.
- The rate of weathering depends on factors like pH, temperature, surface area, competing ions, and fluid flow rates. Minerals with higher silicon-to-oxygen ratios are more resistant to weathering.
The document discusses the importance of geology in Indian rock monuments. It notes that various rock types were used for construction based on their availability, strength, and resistance to weathering. Over time, materials progressed from clay to wood to softer stones to harder stones as construction techniques advanced. The mineral composition and properties of the rock determined its resistance to physical and chemical weathering. Combined with climate and topography, weathering has destroyed or left many monuments in ruins over centuries. Understanding the geology is essential for conservation and using compatible stones for repairs.
Geography form 1 notes, kenya syllabusHamadySagiru
Geography is the study of the Earth. There are two main branches: physical geography, which examines landforms and climate, and human geography, which studies human activities and settlements. Geography relates to other subjects like chemistry, physics, agriculture, biology and history.
The solar system consists of the Sun and objects that orbit it, like planets, asteroids, comets and moons. The Earth originated from a cloud of gas and dust about 4.6 billion years ago. It rotates on its axis and revolves around the Sun, causing day/night and seasons. Internally, it has a core, mantle and crust. Geography involves understanding our planet and its relationship to other celestial bodies.
The document discusses the processes of weathering, erosion, and deposition. It defines weathering as the breakdown of rocks at or near Earth's surface, and erosion as the transport of weathered materials. The main types of weathering are mechanical (physical breakdown without chemical change) and chemical (chemical reactions that alter the composition of rocks and minerals). Key agents of chemical weathering include water, oxygen, carbon dioxide, acids, and temperature. Factors like climate, rock type, surface area, and topography influence weathering rates. Erosion is driven by forces such as gravity, running water, glaciers, wind, and ocean currents, which transport weathered materials and deposit them elsewhere.
This document provides an overview and introduction to a course on geotechnical engineering at Chinhoyi University of Technology. It covers topics like soil formation, properties of soils, soil classification, soil compaction and permeability. It discusses soil mechanics, different types of soils like residual and alluvial soils. It also explains concepts like weathering, clay mineralogy, basic structural units and types of clay minerals like kaolinite, montmorillonite and illite. The document is intended to help students understand the key principles and applications of soil mechanics in engineering.
The document discusses igneous rocks and their formation. It states that approximately 90% of the Earth's crust is composed of igneous rocks. Igneous rocks form from the cooling and solidification of magma. There are two main types of igneous rocks - extrusive and intrusive. Extrusive rocks form from lava at the Earth's surface during volcanic eruptions, while intrusive rocks form from magma that cools and crystallizes below the surface. Intrusive rocks include plutonic rocks, which form at great depths and have a coarse-grained texture, and hypabyssal rocks, which form closer to the surface and have finer textures.
Texture of Ore Minerals; Importance of Studying Textures; Individual Grains Properties; Filling of voids; Texture Types; Genetically differentiated between Texture types; Secondary textures from replacement; Hypogene Texture; Supergene Texture; Primary texture formed from Melts; Primary texture of open-space deposition; Secondary textures from cooling; Secondary textures from deformation; TEXTURES OF ECONOMIC ORE DEPOSITS; Textures of Magmatic ores; Cumulus textures; Intergranular or intercumulus textures; Exsolution textures; Textures of hydrothermal ore deposits and skarns; Replacement textures; Open space filling textures; Textures characteristic of surfacial or near surface environments and processes; Criteria for identifying replacement textures; Vein and Veining have different Nature Features
What is an ore?, Ore deposit environments, Formation of Mineral Deposits, Endogenous (Internal) processes, Exogenous (Surficial) processes, Types of Sedimentary Rocks, Mineral Deposits Associated with Sedimentary Process, physical processes of ore deposit formation in the surficial realm, Erosion, weathering , transportation, sorting, Precipitation, Depositional Environments, Deposits formed by Weathering, Deposits formed by Sediment, Resources from the Sedimentary Environments
The document discusses weathering, which produces the sediments that form sedimentary rocks. Weathering includes mechanical and chemical processes that break down rocks at Earth's surface. Mechanical weathering involves physical breakdown through processes like frost wedging and chemical weathering alters minerals through dissolution, oxidation, and hydrolysis. The rate of weathering is influenced by factors like surface area, rock characteristics, climate, topography, and differential weathering. Weathering produces sediments like clay minerals and dissolved ions that are transported and deposited, eventually lithifying into sedimentary rocks through the rock cycle.
This document provides information on different types of rocks and methods of extracting rocks and minerals from the earth. It discusses igneous rocks which form from cooling magma, sedimentary rocks which form through the compaction and cementation of sediments, and metamorphic rocks which form from changes to existing rocks through heat and pressure. It also describes surface mining techniques like open-pit mining and strip mining used to extract deposits near the earth's surface, as well as subsurface mining techniques like shaft mining used for deeper deposits. Factors that affect decisions around mineral extraction include the grade, size and value of deposits as well as costs of exploration, transportation and environmental impacts.
What is Geochemical distribution, Geochemical distribution of elements and factors affecting, Why to Study, Types of elements on basis of Geochemical distribution of elements, General Distribution Table, Associated Refrences
This document provides an introduction to petrology, including definitions and classifications of different rock types. It discusses the three main types of rocks: igneous rocks formed from cooling magma or lava, sedimentary rocks formed from weathered materials, and metamorphic rocks formed from changes to pre-existing rocks. It describes common textures and structures seen in each rock type, such as vesicular, columnar, and gneiss textures. Finally, it discusses the importance of petrology for civil engineering applications by providing details on rock properties relevant to strength and durability.
Igneous rocks are formed by the cooling and solidification of magma. They are classified based on their texture, mineral composition, and mode of formation. The three main types are volcanic, plutonic, and hypabyssal rocks. Common igneous rocks include granite, basalt, pumice, and diorite. Granite is widely used in construction due to its hardness, frost resistance, and high compressive strength. Basalt is used for building blocks, cobblestones, and insulation. Engineering considerations for igneous rocks include alkali-silica reactivity and using weathered rocks for foundations.
The document provides an overview of earth and life sciences topics including minerals, rocks, and the three main types of rocks - igneous, sedimentary, and metamorphic. It discusses how rocks are formed, classified, and the importance of studying rocks and minerals. It also summarizes the rock cycle and exogenic processes of weathering and erosion, describing the physical and chemical agents that break down rocks and how eroded materials are transported and deposited in new locations.
The document provides an overview of earth and life sciences topics including minerals, rocks, and the rock cycle. It discusses the three main types of rocks - igneous, sedimentary, and metamorphic - and how they are formed. The document also summarizes the processes of weathering and erosion, describing how physical and chemical breakdown of rocks is transported by agents and deposited in new locations.
Sediments form through the weathering and erosion of rocks, followed by transportation and deposition. There are three main types of sediments: mechanical (clastic), chemical, and organic. Sedimentary rocks form through the compaction and cementation of sediments via the process of diagenesis. Sedimentology involves the study of sediment formation and depositional environments, while stratigraphy examines the temporal and spatial relationships between sedimentary strata. Key methods used in sedimentology include facies analysis, particle size and shape analysis, lithological analysis, and stratigraphic mapping and description.
SHS Earth and Life Quarter 1 Module 2.pdfryannable1
The document provides information about a module on minerals, rocks, and exogenic processes for an Earth and Life Science course. It includes details about the module such as the topics covered in each lesson, the learning objectives, and assessment questions. The module is intended to help students understand the three main categories of rocks based on their origin, how minerals and rocks are formed, and exogenic processes like weathering and erosion.
This document provides information about igneous, sedimentary, and metamorphic rocks. It begins with the lesson objectives of classifying rocks into these three categories. It then discusses each rock type in detail, including their formation processes and examples. Various diagrams illustrate concepts like the rock cycle and types of metamorphism. Activities are included to help students understand rock identification and transformations through the rock cycle.
This document provides an overview of rocks, including their definition, types, characteristics, and importance. It discusses the three main types of rocks: igneous, sedimentary, and metamorphic. Igneous rocks form from the cooling of magma, sedimentary rocks form through the compaction and cementation of sediments, and metamorphic rocks form from changes to pre-existing rocks through heat and pressure. The document also outlines key characteristics and formation processes for each rock type, and describes their economic and other importance, as well as some disadvantages.
This document discusses weathering and erosion. It defines weathering as the breakdown of rocks at Earth's surface through physical or chemical processes. Erosion is defined as the physical transportation of weathered material by forces like water, wind, ice or gravity. It then describes the three main types of weathering: mechanical (or physical) weathering which breaks rocks without changing their chemical composition, chemical weathering which decomposes rocks through chemical reactions, and biological weathering caused by organisms. Specific examples of each type of weathering like frost wedging, hydration and burrowing are provided. Factors that influence the rate of weathering like climate, mineral composition and slope are also outlined.
The document outlines learning outcomes for a lesson on rock types:
a) Identify and describe the three basic rock types;
b) Describe how each rock type forms and define their environments;
c) Describe how rocks are transformed through the rock cycle;
d) Identify and describe geologic processes in the rock cycle.
This document discusses a lecture on weathering and erosion given by Dr. Shahid Ullah. It covers the main topics of the lecture including definitions of weathering and the processes involved, physical and chemical agents that cause weathering, factors affecting the rate of weathering, the products of weathering, erosion and factors influencing erosion rates. The document provides detailed explanations and examples of various weathering and erosion concepts.
The document outlines specific learning outcomes for a lesson on rock types. At the end of the lesson, students will be able to: identify and describe the three basic rock types; describe how each rock type forms and define their environments of formation; describe how rocks are transformed through the rock cycle; and identify and describe different geologic processes in the rock cycle.
The document outlines specific learning outcomes for a lesson on rock types. At the end of the lesson, students will be able to: identify and describe the three basic rock types; describe how each rock type forms and define their environments of formation; describe how rocks are transformed through the rock cycle; and identify and describe different geologic processes in the rock cycle.
Oceans also contain a huge amount of mineral resources. Deep ocean basins are the zones of continuous sedimentation. The oceans are the final destination for many of all the sediments to be deposited. About 200 million years of earth history are available in the fossiliferous sediments deposited within the ocean basins. This module explains the characteristics of marine sediments.
Geologists visited the Malekhu area to study geology. Over two days, they identified and studied various rock types including marble, granite, schist and quartzite. They also examined geological structures such as joints, folds, faults and thrusts. The geologists used compasses to measure the orientation of planar geological features. The field visit provided knowledge about rocks, structures, and field techniques that will help the geologists in their work.
Weathering is the physical and chemical breakdown of rocks at Earth's surface. Physical weathering breaks rocks into smaller pieces through frost cracking, plant root growth, abrasion by water, ice or wind. Chemical weathering alters the composition of rocks through oxidation, hydrolysis and carbonation. The rate of weathering depends on climate, mineral composition, and surface area. Weathering produces sediments and soils through mechanical and chemical breakdown over time.
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Geology Q&A
1. Institute of Technology of Cambodia Geology: Prof, ENG Chandoeun
2018-2019 Prepared by: KEO Sokheng
Geology
Lesson 1
1. What is geology?
Geology is the term derived from the Greek word which GEO mean Earth and LOGOS mean Science. It
is the study of the Earth, including the materials that it is made of, the physical and chemical changes that
occur on its surface and in its interior, and history of the planet and its life forms.
2. What civil engineer define geology?
In civil engineering, geology provides necessary information about the site of construction phase
of an engineering project.
3. The relationship between Geological Engineering and other engineering sciences:
Geological engineering helps
Civil Engineering to study about Roads, Foundations, Tunnels, Slopes and Dams.
Mining Engineering to study about Potash, Gold, Uranium and Coal.
Petroleum Engineering to study about Oil, Natural Gas, Tar Sands and Oil Shale.
Environmental Engineering to study about Groundwater, Wastes, Contaminations,
Pollution and Remediation.
4. What is the scope of geology engineering on civil engineer?
The scope of engineering geology is best studied with reference to major activities of profession
of civil engineer which are: Construction, water resource development, town and regional
planning.
5. Why should study geology?
Geology plays a very important role in the field of civil engineering such as:
Planning:
Topographic map
Hydrological map
Geological map
Designing:
Presence hard rock, their depth, and inclination with surface
Mechanical properties of rock
Presence of structural weakness
Position of ground water and seismic nature of the area
Construction:
Lesson 2
1. What is mineral?
A mineral is a naturally occurring, solid crystalline substance, generally inorganic, with specific
chemical composition. Minerals are “building block” of rocks
2. What defines a mineral?
Naturally occurring
Inorganic
Solid
Specific composition (e.g., Gold-Au, Salt-NaCl, Quartz- SiO2)
3. How do we identification minerals?
Chemical composition (microprobes and wet chemical methods)
Crystal structure (X-ray diffraction)
Physical properties (hardness, cleavage, fracture, color, specific gravity crystal habit)
4. What is cleavage?
2. Institute of Technology of Cambodia Geology: Prof, ENG Chandoeun
2018-2019 Prepared by: KEO Sokheng
Cleavage: tendency of minerals to break along flat planar surfaces into geometries that are
determined by their crystal structure.
5. How do we classification the minerals?
Silicate minerals:
Silicate
Ferromagnesian silicates
Non- Silicate minerals
6. What are silicate minerals?
Most important mineral group
Made with silica tetrahedrons (light colored)
Comprise most of the rock-forming mineral
Very abundant due to large amounts of silicon and oxygen in Earth’s crust
7. Give example of silicate minerals?
Feldspar
Mica
Olivine
Quartz
Pyroxene
8. What are Ferromagnesian Silicate Minerals?
It is the combination of Silicate with iron and magnesium (darker)
9. Example of Ferromagnesian Silicate Minerals?
Amphiboles
Pyroxenes
Olivine
Garnets
Kaolinite
10. How many groups of important non-silicate minerals?
Oxides (Spinel, Hematite)
Sulfides (Pyrite, Galena)
Native Elements
Carbonates (Calcite)
Halides (Halite)
Phosphates
11. What are the most common 6 minerals?
The six minerals olivine, quartz, feldspar, mica, pyroxene and amphibole are the commonest
rock-forming minerals and are used as important tools in classifying rocks, particularly igneous
rocks.
12. How are minerals formed? Explain.
Solution: if a solution is supersaturated, minerals will precipitate.
Magma: minerals form during cooling of a magma – the slower a magma cools, the larger the
crystals.
Metamorphism: transformation due to changes in pressure and temperature
13. What are magma and lava?
Magma & Lava are the mixture of molten rock, gases and mineral phases, produced by mantle
melting.
14. What are rocks?
An aggregate of one or more minerals; or a body of undifferentiated mineral matter (e.g.,
obsidian); or of solid organic matter (e.g., coal).
3. Institute of Technology of Cambodia Geology: Prof, ENG Chandoeun
2018-2019 Prepared by: KEO Sokheng
15. What is the classification of rocks?
Igneous rocks (form by solidification of molten rock (magma))
Sedimentary rocks (form by lithification of sediment 9sand, silt, clay, shells))
Metamorphic rocks (form by transformations of preexisting rocks (in the solid state))
16. Describe the cycle of rocks?
Magma
Crystallization (freezing of rock)
Igneous rocks
Erosion
Sedimentation
Sediments & sedimentary rocks
Tectonic burial and metamorphism
Metamorphic rocks
Melting
17. How many types of Igneous Rock?
There are two: Intrusive and Extrusive.
Intrusive (plutonic rock):
Form within the Earth
Slow cooling
Interlocking large crystals
Ex: Granite
Extrusive (volcanic rock)
Form on the surface of the Earth as a result of volcanic eruption
Rapid cooling
Glassy and/or fine-grained Texture
Ex: basal
18. Example of igneous rocks:
Andesite, Diorite, Gabbro, Tuff, Pumice and Obsidian
19. What is Sedimentary Rock?
Sedimentary rocks are formed by from consolidation of sediments that are transported by water,
wind or ice, or deposited by organism.
20. The Formation of Sedimentary Rock:
Weathering is breaking down of rock into sediments
Erosion involves weathering and the transportation of sediments.
Deposition is the process when water, wind, ice or gravity loses energy causing sediments to
drop
Larger sediments are sediments are deposited first; smaller sediments are dropped later.
21. Kinds of Sedimentary Rocks:
Sedimentary rocks can be placed into 3 groups on the basis of composition and origin: Siliclatic,
Chemical/Biochemical, and Carbonaceous.
22. What is silicate rock?
Siliclastic rocks are composed dominantly of silicate minerals (quartz, feldspar, rock fragments).
These minerals originate mainly by chemical and physical breakdown (weathering) of igneous,
metamorphic, older sedimentary rock. Ex: sandstone and shales, volcanicclastic.
23. What is Chemical/Biochemical sedimentary rock?
Chemical/Biochemical sedimentary rocks are composed of minerals precipitated mainly from
ocean or lake water by inorganic (chemical) and/or organic (biogenic) processes. Ex: limestone,
chert, evaporates (gypsum, phosphorites, iron-rich sedimentary rocks.
4. Institute of Technology of Cambodia Geology: Prof, ENG Chandoeun
2018-2019 Prepared by: KEO Sokheng
24. What is Carbonaceous rock?
Carbonaceous rocks contain a substantial amount (>~15%) of highly altered remains of the soft
tissue of plants and animals, referred to as organic matter. Ex: coal, oil shale.
25. What is Metamorphic Rock?
The rocks which have formed through the operation of various types of metamorphic processes
on the pre-existing igneous and sedimentary rocks involving changes in textures, structures and
mineralogical compositions.
26. What is the formation of metamorphic rock?
Form by heat and pressure changing one type of rock into another type of rock.
Form near intrusions, at plate subduction zones and in deep mountain root.
Lesson 4
1. What are superficial deposits?
Superficial deposits refer to the most recent geological deposits, unconsolidated sediments,
including stream channel and floodplain deposits, beach sands, talus gravels and glacial drift and
moraine.
2. What is Soil?
Geologists use the term to refer to any rock waste, produced by the disintegration of rocks at the
surface by weathering processes, which has formed in situ.
Engineers use the term to refer to any superficial or surficial deposit which can excavated
without blasting.
3. What are the parents of rocks?
Parent Rock are Igneous, Sedimentary, Metamorphic.
4. What is Residual soil?
In situ weathering (by physical &chemical agents) of parent rock.
Transported soil (weathered and transported far away and Transported by: wind, water, ice).
5. How do we classify the soil?
By their liquid limit and Plastic limit.
The liquid limit is arbitrarily defined as the water content, at which a pat of soil in
standard cup and cut by a groove of standard dimensions (13 mm) will flow together.
Plastic limit is water content at which a soil can no longer be deformed by rolling into 3.2
mm diameter threads without crumbing.
6. What is Atterberg Limit?
It is used to determine the plastic and liquid limits of a fine-grained soil.
7. What is Coarse Soil?
The microstructure of sand and gravel refers to its particle arrangement that, in turn, involves its
packing.
Grain size and sorting have a significant influence on the engineering behavior of coarse soil.
Larger particles, the higher the strength, and deposits consisting of a mixture of different-sized
particles usually are stronger than those that are uniformly graded.
Ex: sand-gravel mixture has a significant effect on shear strength.
8. What is silt and loess?
Silt is granular material of a size between sand and clay, whose mineral origin is quartz and
feldspar. It occurs as a soil (sand mixed with clay) or sediment mixed in suspension with water
and soil in a body of water, e.g. river.
Loess: wind-blown deposit comprised predominantly of silt-size particles (20 -60 µm).
9. What is the Clay deposit?
5. Institute of Technology of Cambodia Geology: Prof, ENG Chandoeun
2018-2019 Prepared by: KEO Sokheng
Clay deposits are composed principally of fine quartz and clay minerals (kaolinite, illite and
montmorillonite).
10. What cause the settlement of building?
Clays shrink where they dry out, causing settlement of building.
11. How Ferruginous and aAluminous clay product?
Ferruginous and aluminous clay soils are frequent products of weathering in tropical latitude.
They contain iron and aluminum oxides and hydroxides.
12. What is Dispersive Soil also called Sodic Soils?
It is the soil that are:
dislodged easily and rapidly in flowing water.
Highly susceptible to erosion and containing high percentage of exchangeable sodium
ions.
Disperse into basic particles (sand, silt and clay), even in still water.
13. What are the Problems caused by dispersive soils?
Surface erosion
Tunnel formation
Gully formation
Sinkholes
High suspended sediment loads
14. The Frost action in soil:
Sever damages to pavement layers may result from frost action.
Due to freezing soil volume increase and cause ice crystals and lenses
Frost Heave: distortion or expansion of the subgrade soil or base during freezing temperature.
During spring ice lenses melt which result in water content increase => reducing strength of the
soil
15. The Occurrence require to Frost action in soil:
shallow water table that provide capillary to frost line
frost susceptible soil (most server in silty soil)
ambient temperature must be lower than zero for several days
16. The Treatment to Frost action in soil:
remove soil subjected to frost action
replace with suitable granular backfill to the depth pf frost line
installation of drainage facilities to lower water table
restricting truck traffic during spring
17. What is the Organic soil?
Large amount of organic matter
Dark brown to black color and distinctive odor.
Soft, wet, unconsolidated
It can give rise to geotechnical problems in area of sampling, settlement, stability…
Lesson 4
1. Planning is to determine a particular course of action.
2. What is geological information?
Geological information is required at all levels of planning and development from the initial
identification of a social need to the construction stage.
3. Why geological information is necessary after construction?
After construction, geological information is necessary in the form of advice on hazard
monitoring, maintenance or remedial works.
6. Institute of Technology of Cambodia Geology: Prof, ENG Chandoeun
2018-2019 Prepared by: KEO Sokheng
4. What is Geological hazard?
Geological hazard is an extreme natural event in the crust of the earth that pose a threat to life,
structure, and other property. crust of the earth that pose a threat to life, structure, and other
property.
5. What are the Natural geohazard includes?
Volcanic activity
Earthquake
Landslides and slope movement
River action and flooding
Marine action
Wind action
Glacial hazard
6. What Geological Hazards, Risk Assessment and Planning included?
It includes:
Waste disposal
Subsidence due to mining
Subsidence due to the abstraction of fluid
Induced sinkholes
Induced seismicity
7. Development of planning policies for dealing with geohazards:
Evaluation the degree of risk (life, property, possessions and environment)
Vulnerability analysis (classification of risk and geohazard)
Prevention and mitigation measures (structural and technological)
The information related to this problem can be mapped as Hazard Map.
8. What is hazard map?
Hazard map provides idea of the engineering problems that may arise in the area. It should be
provided information relating to the special and temporal probabilities of the hazard. Included:
Any special aspect of hazard
Data from surveys (history of past and future hazard of study area)
Degree of hazard
Specific risk zoning or zones indicating exposure to a specific hazard
9. What is Volcanic activity?
Volcanic activity referred to Volcanic eruption is a process wherein volcanic materials such as
molten or hot fragmented rocks, or gaseous materials are ejected from a volcano.
10. What are the Geohazard includes?
Geohazard includes:
Lava flow
Lahar flow (mudflows)
Flood (sudden melting of snow and ice)
Tsunamis generated by explosive eruption
Poisonous gases
11. What are the Prevention and Mitigation of volcanic eruption?
Losses caused by volcanic eruptions can be reduced by combination of prediction, preparedness
and land-use control. Example:
Building steeply pitched reinforced roofs that are unlikely to be damaged by ash fall.
Constructing walls and channels to deflect lava flows
Forecasting eruption
7. Institute of Technology of Cambodia Geology: Prof, ENG Chandoeun
2018-2019 Prepared by: KEO Sokheng
12. What is an earthquake? And its Geohazard includes.
An earthquake is a shaking of the ground caused by sudden slippage of rock masses below or at
the surface of the earth. Geohazard includes:
landslides, floods, subsidence, tsunamis
13. What are the Prevention and Mitigation to seismic?
Seismic evidence obtained from history record
Estimates strong ground motion
Identifies seismic or micro-seismic zoning
Seismic monitoring
Earthquake resistance design
14. What is the Landslide and slope movements?
Massive outward and downward movement of slope-forming materials
The term landslide is restricted to movements of rocks and soil masses
Initiated when a section of a hill slope is rendered too weak to support its own weight
15. What are the Prevention and Mitigation to Landslide and slope movements?
Collect data from landslide hazard map (Why, When, where landslides are likely to occur)
Geomorphological mapping, aerial photograph, satellite image
Subsurface investigation, sampling, pore water pressure testing.
Removing unstable materials from the slope
Slope reduction (stabilize the toes of slope, benching of steeper slope)
Slope flattening
Drainage
Restraining structures control landslides (retaining walls, rock anchors...)
16. What is the River action and flooding?
All rivers form part of a drainage system, the form of which is influenced by rock type and
structure, the nature of the vegetation cover and climate.
17. What is Flood?
Floods represent one of the commonest types of geological hazard. However, flooding is more
predicable than earthquake and landslide.
18. What are the Prevention and Mitigation of River action and flooding?
Identifies flood zones from historical evidence (magnitude of floods, amount of damage…)
determines the discharge rate, size and depth of area of inundation, and duration of flood.
designs the flood plains for specific types of land-use:
Channel zone: water should be flowed freely without obstruction
Bridges: should allow sufficient waterway capacity
Area with recurrence interval of 1 -20 years: should be used for agriculture
Area with recurrence interval of 20 -100 years: uses for building construction
19. What is the marine action?
Waves, acting on beach materials, are a varying force. They vary with time and place due to:
Changes in wind force and direction
Changes in costal aspects and offshore relief
20. What is the Problem cause by marine action?
Coastal erosion
Cliff land sliding
Submarine slope becomes very wide
8. Institute of Technology of Cambodia Geology: Prof, ENG Chandoeun
2018-2019 Prepared by: KEO Sokheng
21. What are the Prevention and Mitigation to marine action?
Investigation the landforms and rock formations along the beach and adjacent rivers, giving
particular attention to their durability and stability.
Seismicity study
Estimates the rate of erosion
Topography and hydrology surveys
The groyne construction
Storm tide warning services
Tsunamis monitoring (e.g., seismograph…)
Building can be constructed with reinforced concrete frames and elevated on reinforced concrete
piles with open spaces at ground level (e.g., for parking, tsunamis may flow through the
ground...)
22. What is the Wind action?
In arid regions, because there is little vegetation and the ground surface may be dry, wind action
is much more significant, and sediment yield may be high.
There is high soil erosion
Migration of sand dunes (sand and dust storm)
Movement of sand can bury obstacles in its path such as roads, railway or accumulate against
large structures.
23. What are the Prevention and Mitigation of wind action?
Meteorological data analysis (structures may be pitted or fluted relates to wind direction)
Areal photos and remote sensing imagery (study dune movement)
Removing sand at construction site (depend on quantities of sand)
Stabilizes mobile sand (vegetative cover, natural geotextiles, chemical spray…)
Gravel or coarse aggregate can be placed over a sand surface to prevent its deflation
24. What is the Glacial hazard?
The rapid movement of masses of snow or ice down slopes as avalanches can pose a serious
hazard in many mountain areas.
Glacier flood
25. What is Waste disposal?
Mining waste, domestic waste, commercial waste, industrial waste…
Deposited wastes can undergo changes through chemical reactions, resulting in dangerous
substances being developed.
26. What are the Waste disposal treatment and management?
Site exploration to determine the geological and hydrological conditions
Chemical analysis of groundwater
Mineralogical analysis of soil and rock
Making impermeable layer (clay, cement or plastic lining...)
Dilution and dispersion of leachate
Selection landfill site for a particular waste or a mixture waste
Properly designed and constructed new site for long-term protection of ground and surface water
27. What is the Subsidence due to mining?
The subsidence effects of mineral extraction are governed
Consideration mining methods and properly mining design for each mineral deposit
Geological condition (fault, rock types, stress...)
Hazard maps recorded safe and unsafe mining zones
Consideration shape, size, and form of building before construction at mining area
9. Institute of Technology of Cambodia Geology: Prof, ENG Chandoeun
2018-2019 Prepared by: KEO Sokheng
28. What is the Subsidence due to the abstraction of fluid?
Subsidence due to the withdrawal of groundwater has developed with most effect in those
groundwater basins where is intensive abstraction because the total overburden pressure in
saturated deposits is borne by their granular structure and pore water.
Investigation rate subsidence during groundwater extraction (e.g., few centimeters per year)
Investigation fault or fissure on the surface
Injection water for oil and gas extraction
29. What is the Induced Sinkhole?
Many sinkholes are induced by man’s activities, that is, they result from declines in groundwater
level, especially those due to excessive abstraction.
Most collapses forming sinkhole result from roof failures of cavities in unconsolidated deposits
30. What is the Induced Seismicity?
Induce seismicity occurs where changes in the local stress conditions brought about by man give
rise to changes in strain and deformation in rock masses. Ex: hydrocarbon exploitation
Earthquake can generate with less or more than 5 of magnitude