Desert Flashcards
(43 cards)
What happens when storms dump water fast
Runs off but creates channels that flood
What latitude do desert usually form
20-30 N or 20-30 S
What does the hydrosphere have to do with
Water availibility
What does the lithosphere have to do with
Desert formations
What happens when air between the hot from equator and cold from the poles mix
Form atmospheric pressure called pressure belts
When do desert lakes form
If there is enough rain
Have deep are desert lakes
Usually shallow
Are desert lakes usually permenent or temporary
Usually temporary
What happens when desert lakes dry up
Salt crust called playa
How do sand or dunes move
With wind
What is groundwater that flows under deserts called
Aquifiers
How do oasis form
Aquifiers running close to surface
How does water get into Aquifiers
Areas of high rainfall
How many wind directions are needed to make a cresent dune
1
Why do rivers not flow anywhere
High evaporation, if they do they have high sediment
What are longitudes dunes and how many directions of winds are needed to make them
Parallel ridges 2 directions
What percent of deserts are sand
20 %
How far can they move in one year
Up to 100 m
What is the most common dune
Cresent
What do messa dunes look like
Flat top hills
How many directions needed to make start dune
Lots
What are butte formations
Rock columns
What are messa dunes
Dunes from water erosion
How are badlandss made and what are they
Dry gorges erosion