Wind and Water Processes in Deserts

Question 1

How does a pedestal/mushroom rock form?

Answer 1

Abrasion - wind picks up sand grains and sand blasts lower parts of exposed rock

Question 2

How does deflation happen?

Answer 2

Wind strips sand from an area leaving pebbles which are too large to be moved.
Surface lowered and deflation hollows can form

Question 3

What is traction?

Answer 3

Larger particles are rolled or sliding

Question 4

What is saltation?

Answer 4

Bouncing of smaller particles and wind causes particles to be lifted and carried

Question 5

What does attrition in the wind cause rocks to look like?

Answer 5

Rounded

Question 6

What are exogenous rivers?

Answer 6

Source of river is in mountains/humid regions outside desert regions

Question 7

What is an example of an exogenous river?

Answer 7

River Nile

Question 8

What are endoreic/endorheic rivers?

Answer 8

Flows into deserts and terminates in deserts (completely isolated away from ocean)

Question 9

What are ephemeral rivers?

Answer 9

Flash floods that occurs 1x or 2x a year and often associated with flashy hydrographs