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Physiographic features
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Caves
Natural underground passageways or chambers, or hollowed out cavities in the side of a cliff. [USGS GNIS Feature Class Definitions <
http://geonames.usgs.gov/domestic/feature_class.htm
>]
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Biological resource status and trends: Caves and subterranean habitats
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Information concerning status and trends of biological resources, focusing on caves and subterranean habitats
A Devils Hole primer
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Plain-language questions and answers about the stable-isotopic record obtained from Devils Hole, a cave in south-central Nevada. The data do not agree with the Milankovitch hypothesis concerning the causes of glacial cycles in climate change.
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