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Sample MA-4B
NavDat sample number 4973 · ANDESITE
Sample
| Sample ID | MA-4B |
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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 | D.C. Noble, Michigan Tech University |
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| Comment | The Mustang Andesite was previously assigned a Pleistocene? age Thompson and White, 1964. Its late Miocene radiometric age suggests that the underlying Clark Mountain sequence of Lousetown Formation is late Miocene or older and has a different age than the type section near Lousetown Creek. These age determinations suggest some revision of the stratigraphy of the Northern Virginia Range is in order. Work on this in cooperation with George Thompson of Stanford University is in progress. |
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Location
| Latitude | 39.5167 |
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| Longitude | -119.548 |
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| Location | Storey County |
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| State / province | Nevada |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
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| 9.1 |
|
8.8 |
9.4 |
|
M.L. Silberman and J.L. Morton, 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.
