← Search
Sample KW-66-66
NavDat sample number 4096 · ANDESITE
Sample
| Sample ID | KW-66-66 |
|---|
| Rock name | ANDESITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Collected by | K.L. Wier |
|---|
| Comment | phenocrysts of andesine and also biotite and magnetite; cloudy microcrystalline groundmass; believed to be erosional remnant of a lava flow |
|---|
Location
| Latitude | 45.2986 |
|---|
| Longitude | -111.935 |
|---|
| Location | rock quarry N of Virginia City; Madison County |
|---|
| State / province | Montana |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 49.3 |
|
46.8 |
51.8 |
|
|
Analyses
No chemical analyses are stored for this sample.
