The Paleontology of North America

Tertiary Rocks in North America Today

Explore: the Tertiary in go
or world paleogeography of the go
The glaciers that swept down over the northern states in the Quaternary have removed many of the Tertiary deposits in these states. But in other places around the country, exposures of Tertiary rocks are very common. Large exposures can be found along the Atlantic and Gulf Coasts, Great Plains, Rocky Mountains, Great Basin, Cascade Mountains, and Olympic Peninsula.

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

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

Tertiary Fossils
Fossil photos from Tertiary

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