Analytical method: PER_COM
| Technique | PER_COM |
|---|---|
| Material | WHOLE ROCK |
| Mineral | none |
| Comment | Dan Barker, 2005 |
| Institution | Unknown, Unknown, USA |
| Reference | Dahl, David A; Lambert, David D (1986) Petrology of the Black Hills, Brewster County, Texas. Guidebook - Bureau of Economic Geology, University of Texas at Austin. 23; Pages 320-332. 1986. . |