Forces that shape the Earth: Erosion and deposition notes.pdf

I do not own this. Found on the internet.

1. Erosion
and
Deposition
Agents, Forces, and Results

2. What Caused This?

3. What is Erosion?
•Erosion–moving of rock material from one place
to a new location
Weathering has to happen before erosion. The
rocks have to be broken into smaller sediments
before they can be eroded away.
Weathering & Erosion Study Jams

4. AGENTS OF EROSION
•Wind
•Flowing water
•Waves
•Gravity
•Moving Ice (glaciers)

5. What Is Wind Erosion?
•Wind–sediments that have been transported by
wind appear pitted (holes) and frosted (glazed)
–Effective in moving small, loose material
–Occurs in areas where there is not enough rainfall to
support vegetation
–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).

6. What Is Water Erosion?
•Flowing Water –sediments transported by
water appear rounded and smooth
–Most influential force in erosion
–Transports large objects with fast moving streams
–Helps create landforms:
•rivers
•lakes
•oceans

7. What Is Wave Erosion?
•Waves–relentless pounding can throw broken rocks
against the shore and wash away fine grains
•Erodes (transports):
•softer/weaker rock first
•harder/more resistant left behind
•Can create landforms based on where waves hit land and which
rocks they transport

13. What Is Glacial Erosion?
•Glaciers–moving ice that carries rocks; appear
scratched and grooved

14. DEPOSITION-ICE
•Glacial flows of ice–become slower when the ice
begins melting
–Deposits left by glaciers:
–look similar to normal river deposits and are called 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.