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FACTS & STATISTICS
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DEFINITION
Showing latest available data.
| States (A to Z) |
Description |
| Alabama |
Eocene |
| Alaska |
Pleistocene |
| Arizona |
Triassic |
| California |
Pleistocene |
| Colorado |
Jurassic |
| Connecticut |
Jurassic |
| Delaware |
Cretaceous |
| District of Columbia |
Cretaceous |
| Florida |
Eocene |
| Georgia |
Cretaceous– Miocene |
| Idaho |
Pliocene |
| Illinois |
Pennsylvanian |
| Indiana |
Late Pleistocene |
| Kentucky |
Ordovician– Pennsylvanian |
| Louisiana |
Oligocene |
| Maine |
Devonian |
| Maryland |
Miocene |
| Massachusetts |
Jurassic |
| Michigan |
Holocene |
| Minnesota |
Pleistocene |
| Mississippi |
Eocene |
| Missouri |
Pennsylvanian |
| Montana |
Cretaceous |
| Nebraska |
Pleistocene |
| Nevada |
Triassic |
| New Jersey |
Cretaceous |
| New Mexico |
Triassic |
| New York |
Silurian |
| North Dakota |
Paleocene |
| Ohio |
Ordovician |
| Oklahoma |
Jurassic |
| Oregon |
Eocene |
| Pennsylvania |
Devonian |
| South Dakota |
Cretaceous |
| Tennessee |
Cretaceous |
| Texas |
Cretaceous |
| Utah |
Jurassic |
| Vermont |
Pleistocene |
| Virginia |
Caenozoic |
| Washington |
Pleistocene |
| West Virginia |
Late Pleistocene |
| Wisconsin |
Ordovician– Silurian |
| Wyoming |
Eocene |
See also
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