Search SEDIS
| Data sets | Publications | Expeditions | Thesaurus |
Morrow Formation  | |
|---|---|
| BT | Chronostratigraphic Units |
| .Phanerozoic | |
| ..Paleozoic | |
| ...Carboniferous | |
| ....Pennsylvanian | |
| .....Morrow Formation | |
| RT | Oklahoma |
| Arkansas | |
| Morrowan | |
| SN | Composed of shales with some thin limestones and occasional sandstones. SE Arkansas, and central E and NE Oklahoma. |