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A Tapestry of Time and Terrain:
The Union of Two Maps - Geology and Topography
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Valles Caldera

 Select a new feature About the Quaternary Period
Valles Caldera

Thousands of volcanoes erupted throughout the western U.S. in the last 60 million years, but most individual craters are too small to show up clearly in the tapestry. Among the larger volcanoes is Valles Caldera (a beige and yellow patch in the northwest Rio Grande Rift).

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Satellite image of Valles CalderaImage available from the USGS Geospatial Data Clearinghouse
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U.S. Department of the Interior
U.S. Geological Survey
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Last Modification: 18 Oct 2000 (ebj)
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