LocNo: 4022Gaptank Fm., upper part
| Country: |
USA
|
| Province: |
Texas, Brewster Co.
|
| Locality: |
Marathon, 4 mls W of
|
| Layer: | Gaptank Fm., upper part |
| Lower Boundary: |
UTX middle--upper Gaptank Fm., 305.9 million years
|
| Upper Boundary: |
UTX upper-uppermost Gaptank, 300 million years
|
| Georeference: |