to the National Atlas Home page
About | Fact Sheets | Contact Us | Partners | Products | Site Map | FAQ | Help | Follow us on Twitter 
Part of Project LogoAgricultureBiologyBoundariesClimateEnvironmentGeologyGovernmentHistoryMappingPeopleTransportationWater
to the Interactive Map MakerMap LayersPrintable MapsWall MapsDynamic MapsArticlesMapping Professionals

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


  The North American Tapestry of Time and Terrain

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


Grand Canyon

Geologic Map around the Grand Canyon area



Satellite image of the Grand Canyon, Arizona.
Image available from the NASA Space Shuttle Earth Observations Photography database Photo #STS060-083-005

The winding course of the Colorado River through northern Arizona's mile-deep Grand Canyon is well marked on the map by a vivid contrast in pattern and color. A narrow ribbon of red is occasionally visible; it differentiates the Precambrian granites and tilted metamorphic rocks along the riverbanks from the younger, overlying Paleozoic sedimentary rocks in the canyon walls and at the rim (in blue). Abundant water from melting Pleistocene glaciers is probably responsible for the most recent episode of erosion that has deepened the canyon.