Chapter 18 Flashcards
(10 cards)
A feature created by sediment deposition that commonly occurs in arid regions at the mouth of a draw or canyon is a(n) __________.
A. alluvial fan
B. playa
C. dune field
D. talus slope
E. sedimentation
A. alluvial fan
The main dune form in most deserts is crescent- shaped and usually found migrating across a nonsandy surface; it is called a(n) __________.
A. seif
B. star
C. barchan
D. arabian
E. bajada
C. barchan
______ are dry or seasonal lakes which form in arid landscapes, often leaving white deposits of salt, gypsum or other materials.
A. Alluvial lakes
B. Playa lakes
C. Piedmont lakes
D. Sag ponds
E. Cirque lakes
B. Playa lakes
When the winds have removed all the smaller particles, the remaining surface of rocks and gravel is called ___________.
A. desert pavement
B. alluvial fans
C. playa lake
D. desert varnish
E. bajada
A. desert pavement
Africa’s best example of an exotic river is the __________.
A. Amazon
B. Nile
C. Orange
D. Congo
E. Zaire
B. Nile
Besides a lack of soil, the primary reason for limited soil creep in arid regions is
A. no wind.
B. soil creep is not limited in arid regions.
C. age of the soil.
D. no water.
E. hot temperatures.
D. no water.
A surface created by erosion residual that extends outward from a mountain base is called a(n) ________.
A. inselberg
B. bornhardt
C. salina
D. playa
E. pediment
E. pediment
The primary difference between ergs and hamadas is
A. their rock composition.
B. their age.
C. their latitude of formation.
D. the temperatures which support them.
E. their elevation.
A. their rock composition.
Sand dune formation is an example of
A. aeolian transportation.
B. aeolian erosion.
C. aeolian streaming.
D. aeolian saltation.
E. aeolian deposition.
E. aeolian deposition.
The mesa-and-scarp land formation that forms from overland flow erosion and widespread ravines and gullies is called a ______.
A. plateau
B. pinnacle
C. butte
D. badland
E. arch
D. badland
