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Sample 3289-10
NavDat sample number 4997 · PYROCLASTIC-FLOW
Sample
| Sample ID | 3289-10 |
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| Rock name | PYROCLASTIC-FLOW |
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| Rock type | VOLCANIC |
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| Composition | FELSIC |
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| Material | IGNEOUS |
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| Comment | Base of ash flow tuff sequence. The ages are notably discordant. Based on other ages reported in Ekren and others 1977, the plagioclase appears to be too young. Some of the plagioclase has glass inclusions, but it is not sieve textured. These ash flow tuffs are part of the Hartford Hill Tuff, which is being subdivided into formational units Proffitt and Proffitt, 1976; E.C. Bingler, written communication, 1977 in the entire Walker Lane region. |
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Location
| Latitude | 38.7783 |
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| Longitude | -118.6 |
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| Location | Mineral 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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| 28.3 |
|
27.4 |
29.2 |
|
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.
