LocNo: 4017Smithwick Shale
| Country: |
USA
|
| Province: |
Texas, Hudspeth Co.
|
| Locality: |
Marble Canyon, 0.25 ml N of
|
| Layer: | Smithwick Shale |
| Lower Boundary: |
UTX Smithwick Fm. base, 308.9 million years
|
| Upper Boundary: |
UTX Smithwick Fm. top, 308.6 million years
|
| Georeference: |