Exam 13: Deserts and Wind Action

Which of the following would not be a control on desert development?

Because of their low rainfall, intermittent stream flow, and dry stream beds, desert lack ____.

Sand moving over a dune surface by saltation typically forms ___.

Where sand supply is limited a _____ dune usually forms.

A butte is a narrow valley with a narrow bottom and flat sides.

____ is a hard shiny coating of dark iron and manganese oxides and clay minerals that form on rock surfaces in arid environments.

_____ is the dominant agent of erosion in desert regions.

A transverse dune is a relatively straight, elongated dune oriented parallel to wind direction.

The "horns" in a _______ dune point in a downwind direction.

_______ has extensive loess deposits up to 100 meters thick.

A ____ dune is deeply convex and its horns point upwind.

Dunes are not just desert features, they are commonly found near ____.

In the United States, large areas of _____ are blanketed with a cover of loess.

The Colorado Plateau is marked by peculiar, step-like bends in rock layers called ____.

U.S. deserts in Nevada and northern Arizona are largely the result of the Sierra Nevada Mountains ____.

Most dunes move only ____ per year.

The expansion of deserts into once populated areas is known as ___.

Rock debris picked up in flash floods is deposited at the base of mountains in ____.

Wind-blown sand may sculpt isolated pebbles, cobbles, or boulders into ____.

The Basin and Range province is characterized by rugged mountain ranges bounded by faults.