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Geology
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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
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Features
Legend and Rock Ages
Rock Types
Political Boundaries
Credits

  Features
 

Cascades

 

Close-up of
 the cascades

The great length and strong north-south linearity of the Cascade Range, a narrow, inland, yellow band extending from southern Washington to northern California, contrasts sharply with the varied directional trends of other mountain groups to the east and northeast. The Cascades arose through the plate collisions that have enlarged the western continent over the course of the Cenozoic era. This mountain range contains such large and recently active volcanoes as Mount Rainier, Mount Hood, and Mount Shasta as well as Crater Lake.
Aerial view of Mount Shasta, California.
Aerial view of Mount Shasta was taken by Timothy Lesle.