Geog 1113

The grand erg oriental is an example of a

Sand sea

Small sized sand that is blown in a strong wind will produce ripples that are

Widely spaced

Active sand dunes and sandy deserts cover approximately what percentage of continental land between 30 degrees north and 30 degrees south latitude?

10%

The steepest side of a dune has a maximum angle of about

34 degrees

Relatively small dunes that are crescentic in shape are termed ____________ dunes

Barchan

A common crescent shaped dune with hirns poinyed downwind is called a

Barchan dune

Which of the following dune types is incorrectly matched with the conditions necessary for its formation?

Barchan- abundant sand

Because linear dunes are formed from _____________ winds, they have _____________

Bidirectional; two slip faces

As deltas are depositions features of fluvial processes, so ________ are depositions features of eolian processes.

Dunes

An extensive are of sand and sand dunes is known as

Erg desert or sand sea

Which side of a dune typically has a slope angle equal to that of the angle of repose for sand?

Leeward

As regards to the side of a dune, which of the following is correctly matched?

Leeward - avalanche slope; leeward - angle of repose

Relative to dune movement and form, a dunes slip face forms on which side?

Leeward side

Linear dunes and seif dunes are oriented

Perpendicular to the wind

Desert sand is usually composed of what mineral?

Quartz