Unit 1 Lesson 4: E+D by Wind, Ice, and Gravity

• When wind moves soil, sand, and rock particles - they act as agents of erosion.

• Abrasion - the wearing down of rock by agents of physical weathering.

• Rocks can become smooth and polished.

​How can the wind shape Earth?

The removal of sediment by wind is called deflation.

​Desert pavement is the result of soil and fine sand being blown away leaving behind small pebbles and rocks.

​Creation of Desert Pavement

​Dunes

Dunes are mounds of wind deposited sand that are common along she shores of ocean lakes and in deserts.
Dunes move in the same direction the wind is blowing.
A dunes gently sloped side faces the wind until it reaches the crest, where it will gently fall down the slip face.

• ​Thick deposits of wind-blown, fine-grained, sediment.

• Loess can be found thousands of miles from their original source and build up over thousands or millions of years.

• Forms good soils for growing crops

​

All materials carried and deposited by a glacier.

​Glacial Drift

A glacier is a large mass of moving ice that forms by the compaction due to natural performances.
Glaciers move downhill due to gravity and drop their loads when they melt.

​Glaciers