| Country: | USA   | 
| Province: | Texas, Culberson Co.   | 
| Locality: | El Capitan, 3.5 mls SSW of (Loc1-4)   | 
| Layer: | Williams Ranch Mb.,Cutoff Fa. | 
| Lower Boundary: | Kungurian/Leonardian--Roadian [KUN--ROA], 270.6 million years   | 
| Upper Boundary: | Roadian--Wordian (Murgabian) [ROA--WOR], 268 million years   | 
| Georeference: |  |