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4 Agents of Erosion and Deposition: Water, Wind, Gravity, an
Transcript of 4 Agents of Erosion and Deposition: Water, Wind, Gravity, an
steep slopes, fast moving, rapids, waterfalls, creates valleys
gentler slopes, meanders (bends) are created
flat land, moves slower, meanders grow over time
erosion occurs on outside of bends where water flows faster and picks up sediments, deposition occurs on inside of bend where water moves slower
carry away sediments on shore and they carve out
Longshore current = a current that flows parallel to shore
form when less resistant sediments to erosion remain behind.
to form a
that seeps underground and wears away
When dripping water deposits minerals underground,
Land Use Practices
perpendicular to the shore to prevent beaches from eroding away.
When people build
, they stop some sediment from reaching shorelines that would replace the sand washed away by waves.
have rich soil, but are risky to build on.
to reduce flooding, but they also reduce the nutrients the soil receives from flooding.
Wind can erode rock through
are piles of windblown sand.
can travel overtime as wind picks up sand and deposits it in another place.
are crumbly, thick, windblown deposits of
When people remove
, wind erosion is
likely to occur.
= the downhill movement of a
of rocks or soil because of the pull of
The amount of
in the soil
the likelihood of mass wasting.
Types of Mass Wasting:
= rapid downhill movement of soil, rocks, and boulders
= material moves slowly
= materials move too slow to be noticeable
When mass wasting finishes, the material is
in a more stable location.
= a pile of angular rocks and sediments from a rockfall
can increase the likelihood of mass wasting.
form in mountains and flow downhill
cover large areas of land and move outward from central locations
As glaciers move over
the material in front of them.
Rock and grit within the ice
creates grooves and scratches on underlying rocks.
They carve out
As glaciers melt, they leave behind the
they pushed forward.
= a mixture of various sizes of sediments they pushed forward.
a mound or ridge of unsorted sediment deposited by a glacier.
= layered sediment deposited by streams of water that flow from a melting glacier.
= large deposit of sediment that forms where a stream enters a large body of water
Waterfalls form where
rock erodes away below
rock. The hard rock creates an
above the forming
pool below. As the pounding water carves away the soft rock below, the overhang will eventually collapse, moving the waterfall further
How did this pond get here?
= a large mass of ice that forms on land and moves slowly across the Earth's surface