weathering, erosion and depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...erosion,...
TRANSCRIPT
![Page 1: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/1.jpg)
Weathering, Erosion and Deposition
![Page 2: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/2.jpg)
Shaping the Earth’s Surface
Weathering
• the process of breaking down rocks into smaller fragments
Erosion
• the transport of rock fragments from one location to another
Deposition
• the settling of rock fragments in a new location
![Page 3: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/3.jpg)
Weathering
Breakdown of earth materials, brought about by weather at the earth’s surface
There are three types of weathering:
• Physical
• Chemical
• Biological
![Page 4: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/4.jpg)
Physical Weathering
rocks are broken down by physical means (there is no change in the chemicals making up the rock)
![Page 5: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/5.jpg)
Ice Wedging
•Water fills cracks in rocks, then freezes
•As water freezes, it expands and pushes the rock apart.
![Page 6: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/6.jpg)
Wetting and Drying
• Clays swell and shrink, causing rocks to fall apart.
![Page 7: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/7.jpg)
Wind and water effects
•Wind and water move sand and small rocks around, rubbing them against each other until they gradually wear into smaller fragments.
![Page 8: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/8.jpg)
Chemical Weathering
Rocks are broken down by chemical reactions, which causes the rocks to change their composition and become weaker.
![Page 9: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/9.jpg)
• Chemicals in rain, snow and air break down some minerals in rocks.
![Page 10: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/10.jpg)
• Some minerals such as feldspar, hornblende and augite react with water to form clays (hydrolysis).
![Page 11: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/11.jpg)
• Oxygen from air combines with iron in some minerals to form rust (resulting in red soil - oxidation).
![Page 12: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/12.jpg)
• Many minerals, such as limestone and marble, dissolve easily in weak acids such as rainwater. Rainwater is usually slightly acidic because carbon dioxide dissolves in it to form carbonic acid.
• Acid rain forms stronger acids which can speed up the rate of chemical weathering.
![Page 13: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/13.jpg)
Biological Weathering
If physical or chemical weathering has been caused by a plant or animal, the process is sometimes referred to as biological weathering.
![Page 14: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/14.jpg)
• Plant seeds or roots may grow in tiny cracks in rocks.
• As the plant grows, it cracks the rock.
![Page 15: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/15.jpg)
• Burrowing animals move rocks around and can expose new rock surfaces to weathering.
• Rotting vegetation forms acids which also lead to chemical weathering.
![Page 16: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/16.jpg)
Weathering and Minerals
• Quartz is very resistant to weathering (doesn’t react with water, oxygen or acids, and has no cleavage).
• Other rock-forming minerals (feldspar, horneblende, mica, augite, calcite) are easily mechanically weathered into small fragments and chemically weathered into clay.
• Calcite, gypsum and halite can also be dissolved in water.
![Page 17: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/17.jpg)
Weathering and Rocks
• IGNEOUS ROCKS weather faster in wet climates due to ice wedging and hydrolysis. They generally weather into clay minerals with quartz pebbles and sand.
![Page 18: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/18.jpg)
Weathering and Rocks
• SEDIMENTARY ROCKS are only as durable as the cements that hold them together; calcite cement weathers quickly while silica cement is VERY durable.
![Page 19: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/19.jpg)
Weathering and Rocks
• METAMORPHIC ROCKS are resistant to mechanical weathering, but susceptible to chemical weathering; for example, marble is a great building material in a dry climate, but not a wet one!
![Page 20: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/20.jpg)
• RATE OF WEATHERING DEPENDS ON:
– type of rock
– amount of rock surface exposed
– climate (warm and wet vs. cold and dry)
![Page 21: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/21.jpg)
SOILS
• loose, weathered rock and organic material in which plants with roots can grow.
• Composed of sand, silt and clay.
• Composition varies by location
• Always a precious resource!
![Page 22: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/22.jpg)
• Parent material – rock from which the soil is formed
• Residual soil – soil formed from underlying bedrock
• Transported soil – deposited by wind, rivers or glaciers.
![Page 23: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/23.jpg)
Types of Soil
• Sandy soil allows water to pass quickly through it
• Clay-rich soil holds water, forming a thick muc
• Soil with some clay and some sand is called loam
• Loam is usually the best soil for farming
![Page 24: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/24.jpg)
Soil Profile
• Cross-section of earth which shows the layers of soil
![Page 25: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/25.jpg)
• 3 distinct zones in mature soils
1) A- Horizon: Topsoil • dark coloured (gray or black)
• contains humus (remains of plants and animals broken down by bacteria)
![Page 26: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/26.jpg)
2) B-Horizon: Subsoil • Lighter-coloured (red or brown)
• Often has more clay than topsoil, since rainfall has washed it downwards
![Page 27: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/27.jpg)
3) C-Horizon: Weathered rock • Mixture of soil and weathered rock directly above
bedrock
![Page 28: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/28.jpg)
Erosion, Deposition and the Landscape
• Erosion is the movement of weathered rock from one place to another.
• Causes of erosion include moving water, moving ice (glaciers), wind, and gravity (i.e., landslides).
![Page 29: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/29.jpg)
moving water, glaciers and wind can also deposit the materials they pick up
Deposition is when eroded rock material stops moving and settles (making “deposits”).
![Page 30: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/30.jpg)
Landscapes formed by Moving Water
• sediment (bits of weathered rock) can be carried long distances by moving water before being deposited at another location
• Over millions of years, rivers can transport billions of tonnes of sand, gravel and mud.
![Page 31: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/31.jpg)
• Running water, using sand and pebbles as cutting tools, wears away at the river bed in a process called abrasion.
• Rivers abrade the land on its sides as it flows, making a deeper and deeper valley over time.
![Page 32: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/32.jpg)
River Valleys
• Young river valleys are narrow, fast-flowing and straight.
• Old river valleys have eroded sides and are v-shaped
• When a river crosses a flat region, it slows down and develops wide, shallow valleys
![Page 33: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/33.jpg)
• Rate of erosion of the river valley depends on:
– Slope of the valley
– Amount of water
– Speed of the water
– Type of rock in the valley
![Page 34: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/34.jpg)
Floods and Flood Plains
• A flood plain is the flat land beside a river that is covered by water during flooding
• As flood water drains away, fine mud from the floodwater is deposited on the flood plain.
![Page 35: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/35.jpg)
• The buildup of mud produces a rich soil which can be valuable for agriculture
• Dams and raised banks (dykes) are often used to prevent flooding, but if water rises too high the flood may break through them
![Page 36: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/36.jpg)
Deltas
As rivers flow into lakes and oceans, the flow of water suddenly slows down
Sediments are deposited when the water slows
The sediments build up at the mouth of the river and fan out into a giant triangle shape called a delta
![Page 37: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/37.jpg)
Landscapes formed by Glaciers
• 2/3 of Earth’s fresh water is trapped in large masses of snow and ice called glaciers
• glaciers form when more snow falls than melts every year, causing it to build up over time
![Page 38: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/38.jpg)
• Glaciers “advance” when ice builds up faster than it melts so that the ice creeps further down into a valley
• Glaciers “retreat”when temperatures begin to shrink glaciers. NOTE: they don’t actually ‘retreat’…the leading edge melts away.
![Page 39: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/39.jpg)
Types of Glaciers
• Large ice sheets, called continental glaciers, cover both the Earth’s poles, in Greenland and Antarctica
• Alpine (or valley) glaciers form in mountain areas, and slowly slide down the mountain due forces of gravity
![Page 40: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/40.jpg)
Ice Ages
• Periods of time when the climate was cooler than it is today
• Ice sheets and glaciers covered large areas of Europe and North America
![Page 41: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/41.jpg)
Erosion
Glaciers
• as glaciers move, they scrape and erode the ground beneath them
• scratch marks, called striations, are left on rocks over which a glacier passed.
![Page 42: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/42.jpg)
Erosion Features
Cirque
Bowl-shaped valley at the head of a glacier
![Page 43: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/43.jpg)
Arête
Narrow ridge (high ground) between two cirques
![Page 44: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/44.jpg)
Horn
Pyramid-shaped peak located between three cirques
![Page 45: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/45.jpg)
U-Shaped Valley
Glaciers grind out large valleys as they are pulled downhill by gravity
![Page 46: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/46.jpg)
Hanging Valley
U-shaped valley cut off by a bigger valley created by a larger glacier
![Page 47: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/47.jpg)
Fiord
A narrow inlet of ocean between steep cliffs carved by glaciers
![Page 48: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/48.jpg)
Deposition
moving water and glaciers can also deposit the materials they pick up
![Page 49: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/49.jpg)
Erratics
• Large boulder deposited on the ground by a glacier
![Page 50: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/50.jpg)
Eskers
• Winding ridge of material deposited by a stream running under a glacier
![Page 51: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/51.jpg)
Moraines
• Ridge of rocky material deposited by a glacier. Can be found at the sides and farthest advance of a glacier.
![Page 52: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/52.jpg)
Outwash
• Material deposited by water from melting glaciers
![Page 53: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/53.jpg)
Landscapes shaped by Gravity
• sediments on slopes slowly work their way downwards by the force of gravity – “creep”
• if wet soil and rock on a slope becomes too heavy, landslides may result
![Page 54: Weathering, Erosion and Depositionjohnstonsd36.weebly.com/uploads/2/1/3/3/21338878/...Erosion, Deposition and the Landscape •Erosion is the movement of weathered rock from one place](https://reader036.vdocument.in/reader036/viewer/2022070912/5fb41a85f04f165cec78cc36/html5/thumbnails/54.jpg)
Landscapes Shaped by Wind • Air currents can carry rock particles with it.
• The size of the particles that can be moved depends on the speed of the wind
• Wind erosion is most common in dry climates and in flat, open areas