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

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

Glaciers

Glacier Types

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

TILL

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.

THE END