Exam 6: Glaciers, Deserts, and Winds

Crevasses are short, narrow cracks in the plastic flow zone of a glacier that alternately open and close as the ice flows along.

Matching. Match the feature with the appropriate material. -horn

Blowouts are broad, shallow depressions excavated by deflation.

A ________ is an intermittent stream channel in the dry land areas of the western United States.

The leeward slope of a sand dune is also known as the ________.

Steppes are the driest of the true desert lands.

What term denotes a glacial valley that was partly flooded as sea level rose?

A(n) ________ is a closed depression formed by melting of an ice block buried in a moraine or outwash plain.

The low, bedrock ridges and peaks of a highly eroded, basin and range, desert landscape are called ________.

A broad accumulation of stratified drift deposited adjacent to the downstream edge of an end moraine is a(n) ________.

The downstream end or snout of a glacier advances over periods of time during which ablation exceeds accumulation.

Matching. Match the feature with the appropriate material. -drumlin

Word Analysis. Examine the words and/or phrases for each question below and determine the relationship among the majority of words/phrases. Choose the option which does not fit the pattern.

Bowl-shaped depressions in bedrock at upstream ends of alpine glacial valleys are called ________.

Moraines are the only glacial deposits composed of till.

What is the name for the very large pluvial lake that once existed in northwestern Utah?

Wind is included along with gravity, water, and ice as an agent of erosion. In many national parks and other areas of natural beauty, statements are often made that credit wind as having sculpted the landscape. Briefly discuss the importance of wind as an agent of erosion and explain why such statements are probably geologically inaccurate.

The upper 50 meters or so of a glacier is known as the zone of ________.

The Colorado River is an example of a large wash.

The Basin and Range region of the western United States is an excellent example of a mountainous desert landscape.