Chapter 15-Wind Processes
the grinding and shaping of rock surfaces by the "sand blasting" action of particles captured in the air is termed
abrasion
The removal and lifting of individual loose particles by the wind is termed
deflation
An extensive area of sand and sand dunes is known as a(n)
erg desert , or sand sea
The term eolian refers to
erosion, transportation, and deposition by the wind
for purpose of discussing eolian processes, the wind acts like a
fluid
the ability of the wind to move materials
is small compared to other transporting agents, such as water and ice.
what is not correct regarding loess
it has low binding strength
Which side of a dune typically has a slope angle equal to that of the angle of repose for sand?
leeward
Relative to dune movement and form, a dune's slipface forms on which side?
leeward side
Wind is ______ effective at eroding and transporting materials than other geomorphic agents because its density is ______ that of other geomorphic agents.
less; lower
what is not a general shape upon which scientists classify dunes
rectilinear
the smallest features shaped by individual saltating grains are
ripples
Pebbles can be moved by _____ in a process known as _______.
saltating particles; surface creep
what is not a correct reference to a desert pavement
sand seas
what is not correct regarding loess deposits?
they are formed of fine-grained clays and silts
the term used to describe rocks that are pitted, fluted or polished from eolian erosion is
ventifacts
Elongated, streamlined ridges aligned parallel to the most effective wind direction are called
yardangs
A depression created by deflation is known as a
blowout depression
Desert pavement refers to
surfaces of concentrated pebbles and gravels