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Sample WC69-5
NavDat sample number 48655 · MONZONITE
Sample
| Sample ID | WC69-5 |
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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 | porphyritic with phenos of hornblende and andesine in groundmass of andesine, sanidine, hornblende, biotite, quartz, magnetite, and apatite; poor exposure makes it difficult to determine the true relation of this unit to the volcanics; it is believed to be younger than the Adel Mountain complex |
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Location
| Latitude | 47.2278 |
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| Longitude | -111.797 |
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| Location | south flank of Finigan Mountain |
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| State / province | Montana |
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| Volcanic field | intrusion that may cut Adel Mountain Volcanics ? |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
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| 81.2 |
|
0 |
75.9 |
|
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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
