Erosionand
Deposition
Erosion - Movement of weathered materials from one location to
another.
Agents of ErosionGravityWaterWind
Glacial ActivityPlants, Animals, & Humans
Deposition - Final stage of the erosional process in which the movement of
transported materials slows and they are dropped in another
location
Deposition - Occurs when sediments are
laid down on the ground or sink to the bottom of a body of water.
Evidence of Erosion
Evidences that sediments were
transported by ...
Running Water- leaves smooth
rounded sediments
Wind- leaves rounded and
frosted sediments
Glaciers- unsorted scratched
and polished sediments
Gravity- leaves sharp and angular sediments
The underlying cause or source of power for
most erosion is GRAVITY
Water Velocity & Water as an Erosive Agent
The predominant agent or erosion is
RUNNING WATER
Discharge - measure of the amount of water that passes a particular point
in a given amount of time
Velocity of a stream depends on
Gradient and Discharge
Wind Erosion is predominant in
VERY DRY areas.
White Rock in Egypt
Why?Lack of vegetationLack of Moisture
Both of which hold soil or sediments together
Valley Glaciers in mountain areas
Continental Glaciers cover
entire continents
Glaciers can carry the LARGEST sediments
(boulders etc.)
Glacial deposits are UNSORTED left in
deposits called TILL or MORAINE
The effects of erosion by the activities of plants, animals, & humans are MINIMAL in comparison to the erosional effects of water, wind, and
glaciers.