| Country: | USA   | 
| Province: | Texas, Stonewall Co.   | 
| Locality: | Aspermont, 6 mls N of   | 
| Layer: | Dog Creek Fm. | 
| Lower Boundary: | Roadian--Wordian (Murgabian) [ROA--WOR], 268 million years   | 
| Upper Boundary: | Capitanian--Wuchiapingian [CAP--DZH], 260.4 million years   | 
| Georeference: |  |