12 s070502 e_erosion and deposition ppt
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Erosion is the process by which rock material is detached and transported from one location to another by forces like wind, water, ice or gravity. There are several types of erosion including wind erosion, water erosion, wave erosion, gravitational erosion and glacial erosion. Deposition occurs when the transported material can no longer be carried by the force and settles in a new location. Deposition happens through processes like decreasing wind speed, slowing water flow or melting ice. Erosion and deposition work together to continuously change the landscape over time as material is worn down and rebuilt in other areas.
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EXAMPLE
EROSION & DEPOSITION
EROSION
Is the process by which natural forces move weathered rock and soil from one place to another.
Sediment – material moved by erosion .
DEPOSITION
Occurs where the agents of erosion lay down sediment.
Mass Movement
Any one of several processes that move sediment downhill.
Different types of Mass Movement
Landslide
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Different types of Mass Movement
Mudflow
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Different types of Mass Movement
Slump
- a mass of rock and soil suddenly slips down a slope.
Different types of Mass Movement
Creep
- very slow downhill movement of rock and soil.
Water Erosion
Rills and Gullies
Rills
- tiny grooves in the soil.
Gully
- a large groove , or channel, in the soil that carries runoff after a rainstorm
Streams and Rivers
Stream
- a channel along which water is continually flowing down a slope.
River
- a large stream
Amount of Runoff
In an area depends on five main factors:
1st – amount of rain
2nd – vegetation
3rd – type of soil
4th – shape of the land
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Through erosion, a river creates a waterfalls, flood plains, meanders, and oxbow lakes.
Waterfall
May occur where a river meets an area of rock that is very hard and erodes slowly.
Flood plain
Flat, wide area of land along a river.
Meander
A loop like bend in the course of the river
Oxbow lake
A meander that has been cut off from the river.
Deposits by River
Deposition creates landforms such as alluvial fans and deltas. It can also add soil to a river’s flood plain.
Alluvial Fans
A wide, sloping deposit of sediment formed where a stream leaves a mountain range.
Deltas
Sediment deposited where a river flows into an ocean or lake.
Groundwater Erosion
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Stalactite – hangs down from the roof of a cave.
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How Water Erode and Carries Sediment
Most sediment washes or falls into the river as a result of mass movement and runoff. Other sediment erodes from the bottom or sides of the river.
Abrasion- is the wearing away of rock by grinding action.
- occurs when particles of sediment in flowing water bumped into the steam again and again.
Erosion and Sediment Load
A river’s slope, volume of flow, and the shape of its trembled all affect how fast the river flows and how much sediment it can erode.
Slope
Is the amount the river drops toward sea level over a give distance.
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2) Intrusive rocks form from magma that cools below the surface. They can be concordant, forming sheets and domes parallel to layers, like sills and laccoliths, or discordant and cutting across layers, like dikes, batholiths, and volcanic necks.
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EROSION & DEPOSITION
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Is the process by which natural forces move weathered rock and soil from one place to another.
Sediment – material moved by erosion .
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Occurs where the agents of erosion lay down sediment.
Mass Movement
Any one of several processes that move sediment downhill.
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Rills
- tiny grooves in the soil.
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Stream
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River
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Through erosion, a river creates a waterfalls, flood plains, meanders, and oxbow lakes.
Waterfall
May occur where a river meets an area of rock that is very hard and erodes slowly.
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Flat, wide area of land along a river.
Meander
A loop like bend in the course of the river
Oxbow lake
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Alluvial Fans
A wide, sloping deposit of sediment formed where a stream leaves a mountain range.
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Sediment deposited where a river flows into an ocean or lake.
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Groundwater can cause erosion through a process of chemical weathering.
Stalactite – hangs down from the roof of a cave.
Stalagmite – pointed piece of rock that sticks u p from the floor.
How Water Erode and Carries Sediment
Most sediment washes or falls into the river as a result of mass movement and runoff. Other sediment erodes from the bottom or sides of the river.
Abrasion- is the wearing away of rock by grinding action.
- occurs when particles of sediment in flowing water bumped into the steam again and again.
Erosion and Sediment Load
A river’s slope, volume of flow, and the shape of its trembled all affect how fast the river flows and how much sediment it can erode.
Slope
Is the amount the river drops toward sea level over a give distance.
Volume of Flow
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Streambed Shape
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Cyclone
This document summarizes the effects of two major cyclones in India - the 1999 Odisha super cyclone and Phailin in 2013 - and discusses cyclone disaster management. It describes the devastating impact of the 1999 cyclone, which killed over 100,000 people, and highlights lessons learned about prioritizing prevention and preparedness. For Phailin, nearly 1 million people were successfully evacuated. The document outlines structural and non-structural approaches to cyclone management, including early warning systems, and notes the risks of climate change for increasing cyclone intensity in the future.
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3. The swirling winds rotate faster, forming a huge circle up to 2,000 km across.
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Erosion and transportation
Weathering is the breakdown of rocks through physical or chemical processes, while erosion is the transportation of weathered sediments by natural agents such as water, wind, or glaciers. There are several types of water erosion that impact landforms, including splash erosion, sheet erosion, gully erosion, and coastal erosion caused by waves. Glaciers erode through plucking and abrasion, smoothing and polishing rock surfaces. Wind erosion can carry dust and sand, wearing away soft rocks and shaping dunes in deserts. Eroded materials are transported through processes like solution, suspension, traction, and saltation, with factors like particle size and environmental conditions influencing how far materials can be moved.
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erosion and deposition is a topic on soil essential to the sudy in both science and environmental science
Glaciation 3
Ice is a powerful force that shapes the landscape through weathering, erosion, transportation, and deposition of rock material. Freeze-thaw weathering causes cracks in bedrock to enlarge when water freezes and expands. Glacial erosion occurs primarily through plucking, where blocks of rock are torn away from fractures, and abrasion, where rock fragments scrape and gouge the landscape. Rock material is transported and later deposited as moraines when glaciers melt, forming lateral, medial, terminal, and recessional moraines along the sides and at the terminus of the glacier.
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The document summarizes the key agents of erosion - water, wind, and ice - and their geologic impacts. It describes how each agent transports and deposits sediment, forming characteristic landforms. Water is the most effective agent, shaping landscapes through stream and river erosion. Glaciers also powerfully sculpt terrain, carving U-shaped valleys and leaving behind deposits like moraines. While having less impact, wind still erodes and deposits sand dunes in arid regions. Sediment deposition results in various rock types, with particle size indicating the depositional environment.
Q1_M2d_Weathering Erosion.pptx
The document discusses the geological processes of weathering, erosion, and deposition that shape the Earth's surface over long periods of time. Weathering breaks down rocks into smaller pieces through mechanical, chemical, and biological means. Erosion then transports these sediments to different locations via agents such as water, wind, ice, and gravity. Finally, deposition occurs as these sediments are deposited in continental, coastal, or marine environments, forming new layers of the Earth's crust.
earth and life 5.pptx
This document discusses exogenic processes, which are external processes that occur near Earth's surface and are part of the rock cycle. It describes various types of weathering including mechanical and chemical weathering. Mechanical weathering breaks rocks into smaller pieces without changing their mineral composition through processes like frost wedging, insolation, and unloading. Chemical weathering decomposes rocks through oxidation, hydrolysis, carbonation, and biological processes. The document also discusses mass wasting, which transports weathered materials down slopes through various types of movements like rock falls, landslides, and flows that are influenced by gravity, water, and earthquakes. Erosion by agents like water, glaciers, and wind further transports materials by processes like solution
Erosion_and_Deposition.ppt
The document discusses the agents, forces, and results of erosion and deposition. It describes the three main processes of erosion as detachment, lifting, and transporting of materials. The key agents of erosion are water, ice, wind, gravity, and waves. Deposition occurs when the transporting medium can no longer move sediment particles, causing them to settle in a new location.
Erosion & deposition
This document discusses erosion, deposition, and the agents that cause them. It defines erosion as the movement of rock material from one place to another by various agents like wind, water, waves, gravity, and glaciers. Deposition occurs when eroded sediments are dropped in a new location as the speed of the transporting agent decreases. The main agents of deposition are wind, water, and ice, which drop sediments when they slow down. The key difference is that weathering breaks down rocks, erosion transports materials, and deposition drops the materials in a new place.
Forces that shape the Earth: Erosion and deposition notes.pdf
I do not own this. Found on the internet.
Erosion & weathering change
S6E5. Students will investigate the scientific view of how the earth’s surface is formed.
Gathering facts over erosion, weathering & deposition
Coasts Revision GCSE
This document discusses various coastal erosion and deposition processes. It describes four types of erosion: hydraulic action, abrasion, corrosion, and attrition. It also discusses weathering processes like chemical, mechanical, and biological weathering. Coastal landforms like cliffs, wave-cut platforms, bays and headlands are formed through erosion. Waves deposit material through processes like longshore drift to create beaches, bars, spits and tombolos. The document provides examples of these features from the Dorset coast in England. Coastal areas need protection, but methods used must consider sustainability.
exogenic-processes-170817105133 (1).pdf
This document discusses various exogenic (surface) processes that shape the Earth's surface through erosion and weathering. It describes different types of physical and chemical weathering that break down rock material. Erosion by water, wind, ice and gravity is then able to transport this weathered material. Mass wasting specifically refers to the movement of this loosened material down slopes due to gravity, which can occur through sliding, flowing or falling. The material is eventually deposited through sedimentation.
Igcse coastal geomorph
Constructive waves tend to build up sediment on beaches through stronger swash movements that transport material upwards. Destructive waves erode beaches through stronger backwash movements that transport material downwards. Coastal sediments are transported alongshore through repeated up and down movement by swash and backwash in a zig-zag pattern that gradually moves the material in the direction of the prevailing waves and winds.
Exogenic processes
This document discusses various exogenic (surface) processes that shape the Earth's surface through erosion and weathering. It describes different types of physical and chemical weathering that break down rock material. Erosion by water, wind, ice and gravity is then able to transport this weathered material, causing landforms to change over time through deposition or sedimentation. Mass wasting specifically refers to the rapid movement of weathered rock and soil down slopes due to gravity, and can occur through different types of slides, flows, falls and creeps.
Chapter 8- erosional forces
1. Erosional forces like gravity, wind, water, and glaciers cause erosion by removing and transporting surface materials from one location to another through processes like mass movement.
2. Mass movement occurs as gravity pulls materials like rock and sediment down slopes, sometimes causing rapid events like landslides but sometimes occurring so slowly they are barely visible.
3. Glaciers are large masses of snow and ice that erode land as they move and later deposit sediments elsewhere, leaving behind features like moraines, eskers, and glacial till.
Exogenic-Process.pptx
Exogenic processes are surface processes like weathering, erosion, and mass wasting that break down and sculpt the Earth's surface. Weathering breaks rocks into smaller pieces through physical weathering, which breaks rocks mechanically, or chemical weathering, which uses chemical reactions. Erosion then transports these broken rock particles by agents like water, wind, ice, and gravity. Eroded sediments are eventually deposited through the process of sedimentation. Mass wasting involves various downhill soil and rock movements under gravity like slides, flows, slumps, and creeps. Together, these exogenic processes significantly degrade and modify the Earth's surface over time.
GCSE Geography Coasts Revision
The document discusses various coastal processes and landforms. It describes the processes of swash and backwash that create different types of waves. It also discusses various erosional processes like hydraulic action, abrasion, and corrosion that lead to cliff recession. Coastal landforms like wave-cut platforms, headlands and bays, stacks and stumps are formed through these erosional processes. Coastal management techniques like groynes, sea walls, and beach replenishment are used to reduce coastal erosion.
Exogenic Process.pptx
Exogenic processes are processes that take place at or near the Earth's surface that cause the surface to wear away through physical and chemical weathering. Some physical weathering processes include ice wedging, release of pressure, growth of plants, animals burrowing, and abrasion by wind and water. Chemical weathering breaks down rock through processes like reaction with water, oxygen, carbon dioxide, acids, and living organisms. Erosion by various agents like water, wind, ice and gravity further transports weathered materials and shapes the landscape over time.
Processes of River
The document summarizes various river, wind, and glacier processes. It discusses the three main types of processes that occur in rivers - erosion, transportation, and deposition. Erosion involves wearing away material from the river bed and banks. Transportation moves eroded material downstream, gradually reducing its size. Deposition occurs when energy levels drop and material is dropped from the river. Similar processes of erosion, transportation, and deposition occur for wind and glaciers.
erosion.pptxsefwakjsdmmxmslkkkmmjjss,ddk
This document discusses the key processes of weathering, erosion, and deposition that shape Earth's landscapes. It describes how weathering breaks rocks down physically through processes like frost wedging and chemically through reactions with water and carbon dioxide. The resulting soil and sediment are then transported by erosional forces like streams and glaciers, and are eventually deposited elsewhere. Factors like particle size, shape, and stream velocity determine where sediments are laid down. Through these interconnected natural cycles, the landscape is continually modified over geological timescales.
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Forces that shape the Earth: Erosion and deposition notes.pdf
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BIO: Sostenitrice del software libero e dei formati standard e aperti. È stata un membro attivo dei progetti Fedora e openSUSE e ha co-fondato l'Associazione LibreItalia dove è stata coinvolta in diversi eventi, migrazioni e formazione relativi a LibreOffice. In precedenza ha lavorato a migrazioni e corsi di formazione su LibreOffice per diverse amministrazioni pubbliche e privati. Da gennaio 2020 lavora in SUSE come Software Release Engineer per Uyuni e SUSE Manager e quando non segue la sua passione per i computer e per Geeko coltiva la sua curiosità per l'astronomia (da cui deriva il suo nickname deneb_alpha).
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12 s070502 e_erosion and deposition ppt
- 1. Erosion and Deposition Agents, Forces, and Results
- 3. What is Erosion? • Erosion - moving of rock material from one place to a new location – For erosion to occur three processes must take place: detachment of particles, lifting them, and transporting them – Many agents of erosion - flowing water, moving ice, waves, gravity, or wind – Sand consists of small pieces of rock that have been weathered from a parent rock, eroded, and deposited somewhere else
- 4. What Is Wind Erosion? • Wind - responsible for wearing away rocks and creating great deserts like the Sahara Desert and Gobi – Most effective in moving loose material – Two main effects: (1) Wind causes small particles to be lifted and moved away. (2) Suspended particles may impact on solid objects causing erosion by abrasion (rubbing). – Occurs in areas where there is not enough rainfall to support vegetation
- 5. What Is Water Erosion? • Water - most influential force in erosion – Ability to move materials from one location to another over long distances – The faster water moves in streams the larger objects it can pick up and transport – Responsible for wearing away of rocks in rivers, lakes, and the oceans
- 6. What Is Wave Erosion? • Waves - relentless pounding – Erodes the softer, weaker parts of the rock first, leaving harder, more resistant rock behind – Can take over 100 years to erode a rock to sand – Energy of waves along with the chemical content of the water erodes the rock off the coastline
- 7. What Is Gravitational Erosion? • Mass movement - downward movement of rock and sediments, mainly due to the force of gravity. – Moves material from higher elevations to lower elevations where streams and glaciers can pick up the material and move it to lower elevations – Process is occurring continuously on all slopes, some act very slowly while others occur very suddenly until equilibrium is reached
- 8. What Is Glacial Erosion? • Ice - moves and carries rocks, grinding the rocks beneath the glacier – Glaciers pluck and abrade to cause erosion – Plucking occurs when water enters cracks under the glacier, freezing, and breaking off pieces of rock that are then carried by the glacier. – Abrasion cuts into the rock under the glacier, smoothing and polishing the rock surface
- 9. What is Deposition? • Deposition - laying down of sediment that has been transported by a medium such as wind, water, or ice – Process of erosion stops when the moving particles fall out of the transporting medium and settle on a surface. This settling is deposition. – If the speed of the medium slows or the resistance of the particles increases, the balance changes and causes deposition. – Speed can be reduced by large rocks, hills, vegetation, etc.
- 10. Deposition - Wind • Wind speed can be related to variations in heating and cooling – Wind can transport fine particles in suspension hundreds of km from its original source in the desert. – Heavier material may be blown along the ground. – Material is eventually deposited when the wind changes direction or loses its strength. – Obstacles, whether natural of man-made, will often decide where the deposition occurs and the nature of the feature formed.
- 11. Deposition - Water • Running water enters a large, fairly still body of water and its speed decreases. – As speed decreases, water's ability to carry sediments decreases – Sediments carried by running water are deposited where the slowing water can no longer move them. Largest particles are deposited near the shore. Increasingly smaller particles settle out farther from the shore where the water is calmer – Occurs in streams, rivers, oceans, etc.
- 12. Deposition - Ice • Glacial flows of ice - become slower when the ice begins melting – Deposits left by glaciers are called moraines and outwashes – Moraines are large chunks of broken rock left at the base and sides of the glacier as it melts and recedes – Finer material is carried in the rivers that form when the glacial ice melts. The deposits of these rivers look similar to normal river deposits and are called outwashes
- 13. What’s the Difference? • WEATHERING - think weather wearing rock down • EROSION - think of a road and traveling • DEPOSITION – think of depositing money in a bank