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Geology
Map Maker
Geologic Map
Shaded Relief
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Generalized Geologic Map of the Conterminous United States
North America Shaded Relief
 

Article

  The North American Tapestry of Time and Terrain

Introduction
The Two Maps
Zoom In
Features
Legend and Rock Ages
Rock Types
Political Boundaries
Credits

  Features
 

Valles Caldera

  Close-up of
 valles caldera region
Satellite view of 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 visible volcanoes is Valles Caldera (a beige patch in the northwest Rio Grande Rift).