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Valley, California

Erosional Landform Pictures

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A valley is any piece of low ground with high ground around it. (more below)
Low ground with high ground around it
Photo (c) 2008 Andrew Alden, licensed to About.com (fair use policy)
"Valley" is a very general term that implies nothing about the shape, character or origin of the landform. But if you asked most people to draw a valley, you would get a long, narrow notch between ranges of hills or mountains with a river running in it. But this swale, which runs along the trace of the Calaveras fault in central California, is also a perfectly good valley. The types of valleys include ravines, gorges, arroyos or wadis, canyons, and more.

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