Analytical method: UNKNOWN
| Technique | UNKNOWN |
|---|---|
| Material | WHOLE ROCK |
| Mineral | none |
| Reference | Parker-Donnie-F Jr.. (1976) Petrology and eruptive history of an Oligocene trachytic shield volcano, near Alpine, Texas. |
| Technique | UNKNOWN |
|---|---|
| Material | WHOLE ROCK |
| Mineral | none |
| Reference | Parker-Donnie-F Jr.. (1976) Petrology and eruptive history of an Oligocene trachytic shield volcano, near Alpine, Texas. |