← Search
Sample M79PR-21
NavDat sample number 7174 · GRANODIORITE
Sample
| Sample ID | M79PR-21 |
|---|
| Rock name | GRANODIORITE |
|---|
| Rock type | PLUTONIC |
|---|
| Composition | INTERMEDIATE |
|---|
| Material | IGNEOUS |
|---|
| Collected by | D.M. Miller |
|---|
| Comment | Groundmass is aphanitic near margins of dike, where it is medium gray and contains phenocrysts of all major phases. Where sampled in the interior of the dike, rock is equigranular, medium grained, chalky white. Zoned plagioclase, potassium feldspar, biotite, hornblende, and quartz are major constituents, minor ones are sphene, zircon, and apatite. Hornblende highly altered; plagioclase partially sericitized. Quartz poor. Extinction in quartz is undulatory. |
|---|
Location
| Latitude | 41.0242 |
|---|
| Longitude | -114.04 |
|---|
| Location | Pilot Range |
|---|
| State / province | Nevada |
|---|
Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 30.1 |
|
29.6 |
30.6 |
|
|
Analyses
No chemical analyses are stored for this sample.
