Erosion and Deposition Erosion - Movement of weathered materials from one location to another.

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Presentation transcript:

Erosion and Deposition

Erosion - Movement of weathered materials from one location to another.

Agents of Erosion Gravity Water Wind Glacial Activity Plants, 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 vegetation Lack 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