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Sample WC69-2
NavDat sample number 48661 · MONZONITE
Sample
| Sample ID | WC69-2 |
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| Rock name | MONZONITE |
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| Rock type | PLUTONIC |
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| Composition | FELSIC |
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| Material | IGNEOUS |
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| Comment | rock is fine-grained and composed of small crystals of sanidine, oligoclase, hornblende, augite, biotite, quartz, apatite, and magnetite; dike extends NW, crosses trace of Eldorado thrust, and extends into Middle Proterozoic strata of the Belt Supergroup in the hanging wall of the Eldorado thrust plate |
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Location
| Latitude | 47.0778 |
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| Longitude | -112.142 |
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| Location | dike is exposed in roadcut on E side of Stearns Wolf Creek Road |
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| State / province | Montana |
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| Volcanic field | dike intruding volcanic member of western facies of Two Medicine Formation |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
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| 47.55 |
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47.07 |
48.03 |
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Analyses
No chemical analyses are stored for this sample.
References
- Harlan, Stephen S; Snee, Lawrence W; Reynolds, Mitchell W; Mehnert,Harald H; Schmidt, R G; Sheriff, Steve D; Irving, Anthony J (2005) U. S. Geological Survey Professional Paper, Report: P 1696, 29 pp.,2005
