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


  The North American Tapestry of Time and Terrain

The Two Maps
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Legend and Rock Ages
Rock Types
Political Boundaries


Coastal Plain


close up of map with outline of the coastal plain

The wide Coastal Plain is composed of late Cretaceous to recent Quaternary deposits that extend from New Jersey to Texas and is one of the Tapestry's outstanding patterns (its inland boundary is outlined here in white). These sedimentary rocks, deposited mostly in a marine environment, were later uplifted and now tilt seaward; some of them form the broad, submerged Atlantic Continental Shelf. Coastal Plain deposits overlap the older, more distorted Paleozoic and Precambrian rocks immediately to the north and west.