← Search
Sample USGSD-M741-2
NavDat sample number 10038 · FELSITE
Sample
| Sample ID | USGSD-M741-2 |
|---|
| Rock name | FELSITE |
|---|
| Rock type | PLUTONIC |
|---|
| Composition | FELSIC |
|---|
| Material | IGNEOUS |
|---|
| Comment | fined grained, resistant felsic dike containing rare phenocrysts of plagioclase partly saussurite and rusty weathering spots caused by biotite altered to chlorite; white muscovite is sparse |
|---|
Location
| Latitude | 45.5294 |
|---|
| Longitude | -112.837 |
|---|
| Location | outcrop at 7900 ft elevation in series of cliffs formed by the Pennsylvanian Quadrant Quartzite; Beaverhead County |
|---|
| State / province | Montana |
|---|
| Volcanic field | Pioneer Batholith |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 64.4 |
|
62.2 |
66.6 |
|
|
Analyses
No chemical analyses are stored for this sample.
