SEDIS - Thesaurus
Fernvale Formation  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Ordovician | |
| ....Upper Ordovician | |
| .....Fernvale Formation | |
| RT | Missouri |
| Oklahoma | |
| Illinois | |
| Alabama | |
| Tennessee | |
| Arkansas | |
| Richmond Group | |
| SN | In Richmond Group and Patterson Ranch Group. N Arkansas, SW Illinois, SE Missouri, and W Tennessee, NW Alabama, central E and NE Oklahoma. |
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