Some of the physiographic features that cause extreme aridity may be found together within a single desert,but the deserts found in the western United States form primarily due to being located ____________.

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The deserts found in the western United States form primarily due to being located within the rain shadow of one or more mountain ranges. As moisture-laden winds from the Pacific Ocean are forced upward by the mountains, they cool and lose their moisture, leading to dry conditions on the leeward side of the mountains. This phenomenon is known as a rain shadow.

Some of the Physiographic Features That Cause Extreme Aridity May