Sample GAD-4
NavDat sample number 12142 · ANDESITE
Sample
| Sample ID | GAD-4 |
|---|---|
| Rock name | ANDESITE |
| Rock type | VOLCANIC |
| Composition | INTERMEDIATE |
| Material | IGNEOUS |
| Comment | bomb; black, gray, red, sparsely microporphyritic with pyroxene and calcic plagioclase euhedral phenocrysts set I hyalopilitic microvesicular matrix |
Location
| Latitude | 40.5 |
|---|---|
| Longitude | -120.953 |
| State / province | California |
| Volcanic field | Walker Lane |
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|---|---|---|---|---|
| 1.8 | 1.3 | 2.3 |