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Sample USGSDE-85g
NavDat sample number 19147 · RHYODACITE
Sample
| Sample ID | USGSDE-85g |
|---|
| Rock name | RHYODACITE |
|---|
| Rock type | VOLCANIC |
|---|
| Composition | FELSIC |
|---|
| Material | IGNEOUS |
|---|
| Collected by | J.E. Elliott |
|---|
Location
| Latitude | 43.0553 |
|---|
| Longitude | -109.947 |
|---|
| Location | near Homestake Mine; Park County |
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| State / province | Montana |
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| Volcanic field | Quartz Eye rhyodacite porphyry |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 41.3 |
|
67.3 |
45.3 |
|
|
Analyses
No chemical analyses are stored for this sample.
References
- Marvin, Richard F; Mehnert, Harald H; Naeser, Charles W; Zartman,Robert E (1989) U. S. Geological Survey radiometric ages; Compilation C; Part five;Colorado, Montana, Utah, and Wyoming. Isochron/West, vol.53, pp.14-19, Jun 1989
