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Quaternary Rocks in North America Today

Explore: the Quaternary in
or world paleogeography of the
While much of the North American continent is covered with a thin layer of Quaternary material, the areas shown on the map include large deposits found in the western U.S., the Mississippi Delta, and along the Gulf and Atlantic Coasts. Also included on this map are areas of recent volcanism including the Cascade Mountains, Snake River Plain, and around Yellowstone National Park.

View modern exposures of rock from
each time period in North America:

Quaternary
Tertiary
Cretaceous
Jurassic
Triassic
Permian
Carboniferous
Devonian
Silurian
Ordovician
Cambrian
Precambrian

Quaternary Fossils
Fossil photos from Quaternary

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