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Sample 88AV01
NavDat sample number 20994 · SHONKINITE
Sample
| Sample ID | 88AV01 |
|---|
| Rock name | SHONKINITE |
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| Rock type | PLUTONIC |
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| Composition | MAFIC |
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| Material | IGNEOUS |
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| Collected by | S.D. Sheriff |
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| Comment | shonkinite dike with phenocrysts of plag, cpx, fresh biotite, and magnetite |
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Location
| Latitude | 47.29 |
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| Longitude | -111.94 |
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| Location | outcrop is obvious where the dike crosses the St. Peter Mission road; Cascade County |
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| State / province | Montana |
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| Volcanic field | Adel Mountains Volcanic field |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 71.2 |
|
68.5 |
73.9 |
|
|
Analyses
No chemical analyses are stored for this sample.
