3. What is Geology…???
The study of Geology mainly concerns itself with the study of the
earth’s origin,structure,composition & history (including the
development of life),and the nature of the processes.So,it is also
known as earth science.
This is a fascinating subject which feels the pulse of the earth.
It dealings with the outer solid shell of the earth composed of rocks,
which is known as lithosphere.
5. INNER CORE
Thought to be as hot as the
surface of the Sun!
Solid
Composed of Iron and Nickel
6. Outer Core
Hot
(but not as hot as the inner core)
Liquid
Composed of Iron and Nickel
7. Mantle
Still hot! –
(but not as hot as the core!)
Largest layer
Composed of various materials
Solid and liquid
Made up of ultra basic rocks.
8. Crust
Its Cool
What we live on
Composed of rocks, various
materials make up the crust
Solid or Liquid?
9. Scope of Geology…
It is a well established interdisciplinary branch of Science and
Engineering has a scope in different fields as outlined below:
(a) In Civil Engineering: Geology provides necessary information
about the site of construction materials used in the construction of
buildings, dams, tunnels, tanks, reservoirs, highways and bridges.
Geological information is most important in planning phase
(stage), design phase and construction phase of an engineering
project.
(b) In Mining Engineering: Geology is useful to know the method of
mining of rock and mineral deposits on earth’s surface and
subsurface.
11. (c) In GroundWater: Resources development geology is
applied in various aspects of resources and supply,
storage, filling up of reservoirs, pollution disposal and
contaminated water disposal.
(d) Land pollution.
(e) Nuclear explosion.
(f) Oceanography.
(g) Space exploration.
In each of the above-mentioned fields Geology has to deal
with an integral part of the earth.
Scope of Geology…
12. Scope of Geology…
Basic objective of Engineering Geology,
It enables a civil engineer to understand engineering
implications of certain conditions related to area of
construction which are geological in nature.
It enable a geologist to understand a nature of geological
information which is essential for safe design and construction
of any civil engineering project.
It is best studied with reference to major activities of a
professional civil engineer
Construction,Water resource development,Town and Regional
planning.
13. Scope of Geology…
For all types of civil engineering structures geological
information about the desired site is important.This information
governs the vital importance in
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 table and seismic nature of the area.
Construction.
14. Branches of Geology
Geology is such a huge and broad subject.The subject comprises a
number of branches which deals with different objective in background.
The branches of Geology are as follows;
Economic geology is concerned with earth materials that can be used for
economic and/or industrial purposes.
Mining geology is the extraction of valuable minerals or
other geological materials from the earth from an orebody, lode, vein which
forms the mineralized package of economic interest to the miner.
Petroleum geology is the study of origin, occurrence, movement,
accumulation, and exploration of hydrocarbon fuels.
Engineering geology is the application of the geologic sciences to
engineering practice for the purpose of assuring that the geologic factors
affecting the location, design, construction, operation and maintenance
of engineering works are recognized and adequately provided for.
Environmental geology, like hydrogeology, is an applied science
concerned with the practical application of the principles of geology in the
solving of environmental problems.
15. Branches of Geology
Geochemistry is the science that uses the tools and principles
of chemistry to explain the mechanisms behind major geological
systems such as the Earth's crust and its oceans.[
Geomorphology is the scientific study of landforms and the
processes that shape them.
Geophysics is the physics of the Earth and its environment in
space; also the study of the Earth using quantitative physical
methods.
Historical geology is the use of the principles of geology to
reconstruct and understand the history of the Earth.
Hydrogeology is the area of geology that deals with the
distribution and movement of groundwater in
the soil and rocks of the Earth's crust (commonly in aquifers).
16. Branches of Geology
Mineralogy is a subset of geology specializing in the
scientific study of chemistry, crystal structure, and physical
(including optical) properties ofminerals.
Paleontology or palaeontology is the scientific study
of prehistoric life. It includes the study of fossils to determine
organisms' evolution and interactions with each other and
their environments (their paleoecology).
Petrology is the branch of geology that studies the origin,
composition, distribution and structure of rocks.
Structural geology is the study of the three-dimensional
distribution of rock units with respect to their deformational
histories.
17. Branches of Geology
Sedimentology encompasses the study of
odern sediments such as sand, mud (silt), and clay, and the
processes that result in their deposition.
Stratigraphy is a branch of geology which
studies rock layers and layering (stratification)
Volcanology (also spelled vulcanology) is the study
of volcanoes, lava, magma, and
related geological, geophysical and geochemicalphenomena.
The term volcanology is derived from the Latin word vulcan.
