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Sample 2605-5
NavDat sample number 4992 · ANDESITE
Sample
| Sample ID | 2605-5 |
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| Rock name | ANDESITE |
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| Rock type | VOLCANIC |
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| Composition | INTERMEDIATE |
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| Material | IGNEOUS |
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| Collected by | F.J. Kleinhampl, U.S. Geological Survey |
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| Comment | Most of Mt. Ferguson and surrounding area is underlain by andesite. Pyroxene in this sample is largely altered to iron oxide, but the plagioclase is quite fresh Ekren and others, 1977. |
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Location
| Latitude | 38.6433 |
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| Longitude | -118.175 |
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| Location | Mineral County |
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| State / province | Nevada |
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| Location comment | of Mt. Ferguson |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
|---|
| 15.4 |
|
14.9 |
15.9 |
|
M.L. Silberman, U.S. Geological Survey |
Analyses
No chemical analyses are stored for this sample.
References
- Morton, Janet L. and Silberman, Miles L. of the U.S. Geological Survey, Menlo Park; Bonham, H.F. and Garside, Larry J. of the Nevada Bureau of Mines and Geology, Reno; and Noble, Donald C. of the Michigan Technological University, Houghton (1977) K-AR AGES OF VOLCANIC ROCKS, PLUTONIC ROCKS, AND ORE DEPOSITS IN NEVADA AND EASTERN CALIFORNIA - DETERMINATIONS RUN UNDER THE USGS-NBMG COOPERATIVE PROGRAM.
