Erosion

Question 1

Factors affecting aeolian erosion?

Answer 1

Lack of vegetation

Dry soil

The regolith

Question 2

Factors affecting water erosion?

Answer 2

Rainfall is intense

Lack of plant cover creates rapid runoff

Question 3

Describe deflation

Answer 3

The wind carrying off small particles, leaving big ones behind

Question 4

What are yardangs?

Answer 4

Pieces of resistant rock sticking out of the desert

Question 5

What are sand seas?

Answer 5

Large areas of dunes

Question 6

What are barchans

Answer 6

Crescent shaped dunes. Their horns point towards the wind

Question 7

What are wadis?

Answer 7

Dry (ephemeral) riverbeds

Question 8

What are alluvial fans?

Answer 8

Deposits of sediment from streams. Effectively land deltas

Question 9

What are abajadas

Answer 9

A series of alluvial fans across a mountain

Question 10

What is a playa

Answer 10

A flat bottom depression which forms temporary lakes

Question 11

How is a canyon formed?

Answer 11

By a river which erodes the rock into a deep ravine between escarpments