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Eolian landscapes are those that have been shaped by

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How are lag deposits formed in a desert?

		when wind erosion selectively removes fine sediment, leaving coarse gravel behind
		when gravel is pitted by sand abrasion
		when deposits are blown away by wind and deposited in dunes

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Water slows down wind erosion, because water tends to hold loose particles together, increasing cohesion.

True

False

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The process by which loose particles are lifted by the wind and blown away is called abrasion.

True

False

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Sand dunes move as

		wind blows them across the desert floor
		water rushes against them
		sand grains move up the slope and accumulate on the downwind face

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		Appalachian Mountains
		south Florida
		Pacific Northwest coastline

		settling out of heavy elements during Earth’s early formation
		outgassing of light gases from Earth’s interior
		decay of living organisms that lived millions of years ago