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Geology
Map Maker
Geologic Map
Shaded Relief
Map Layer
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

  Distribution of Rock Types

Link to sedimentary rock types
Sedimentary

Link to volcanic rock types
Volcanic

Link to plutonic rock types
Plutonic

Link to metamorphic rock types
Metamorphic

 

North American rock types.

Just as we can describe rocks by their age, we can also classify them according to descriptive types. These maps show the distribution of the rocks of North America in each of four general types - sedimentary, volcanic, plutonic, and metamorphic.