← Search
Sample USGSM-712-1
NavDat sample number 3005 · DIORITE
Sample
| Sample ID | USGSM-712-1 |
|---|
| Rock name | DIORITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Collected by | F.J. Kleinhampl and M.L. Silberman, U.S. Geological Survey |
|---|
| Comment | Flows from the west Brawley intrusive mass overlie altered andesites of the Aurora mining district. Sample no. 25 is from approximately the same area as no. 26. This rock is characterized by large phenocrysts of plagioclase up to 1 cm across. A more felsic variety with the same large plagioclase phenocrysts crops out in Bodie Canyon to the west see sample no. 27. |
|---|
Location
| Latitude | 38.2522 |
|---|
| Longitude | -118.918 |
|---|
| Location | Aurora-Cedar Hill-Trench Canyon Alkali Valley Area |
|---|
| State / province | Nevada |
|---|
| Formation | Of west Brawley Peak |
|---|
| Location comment | Mineral County, NV |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 11.9 |
|
11.6 |
12.2 |
|
|
Analyses
No chemical analyses are stored for this sample.
