Exam 15: The Work of Wind and Deserts

What are elongated,streamlined rock ridges in wind-dominated erosional areas called?

Alluvial fan sediment is deposited by flashflood,sheetflow,mudflow,and debris flow.

The major topographic features of western United States deserts formed in the last 8,000 years.

What are the four major dune types generally recognized?

Briefly explain why most deserts develop in the mid-latitude,dry climate zone.

Briefly explain how a rain-shadow desert forms.

Which are the most mobile dunes?

What does wind erode by?

Crescent shaped dunes whose tips point downward are _______ dunes.

Fan-shaped landforms that develop in deserts adjacent to highlands are known as ____ fans.

Loess is important because it ____.

Explain how wind can be a significant intercontinental agent of erosion and deposition.

Equatorial regions receive the most heat,while polar regions receive the least.Therefore,what air pressures would you expect to be characteristic of these regions?

The same geological agents work in all deserts,so landforms of various deserts are similar.

The close-fitting mosaic of pebbles,cobbles,and boulders covering the floor of many deserts and semi-arid regions is called what?

What factors enhance water erosion in deserts?

What can lithified sand dunes tell us?

Surface creep is a common type of mass wasting in deserts.

The finest-grained material in an alluvial fan is found along its margins.

What are windblown deposits of silt and clay called?