Sample TAD-1
NavDat sample number 12130 · ANDESITE
Sample
| Sample ID | TAD-1 |
|---|---|
| Rock name | ANDESITE |
| Rock type | VOLCANIC |
| Composition | INTERMEDIATE |
| Material | IGNEOUS |
| Comment | Dark gray to black, abundantly finely porphyritic with caclic plagioclase, hypersthene, and augite phenocrysts set in hyaolo-ophitic groundmass |
Location
| Latitude | 40.825 |
|---|---|
| Longitude | -120.843 |
| State / province | California |
| Volcanic field | Walker Lane |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 6.4 | 6 | 6.8 |