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Sample CAL10
NavDat sample number 54584 · TUFF
Sample
| Sample ID | CAL10 |
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| Rock name | TUFF |
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| Rock type | VOLCANIC |
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| Composition | FELSIC |
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| Material | IGNEOUS |
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| Comment | Calaveras County, California [SW 1/4, SW 1/4, SW 1/4, SE 1/4, Sec. 7, T5N, R12E] NW Corner of intersection of Highway 49 and 26. Fills channel cut in older tuff and basement. CAL10 is at top of roadcuts. Poorly to moderately welded nearly aphyric Nine Hill Tuff. Glassy portion moderately pumiceous, devtrified portion pumice poor. Glassy and devitrified tuffs separated b a sharp interface, and probablly are separate flow units. Devitrification in devitrified zone is incomplete. About 13 m thick; no overlying tuff. Same location as Woloszyn (1979) #1 |
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Location
| Latitude | 38.2983 |
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| Longitude | -120.702 |
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| State / province | California |
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| Location comment | Tuff of Chili Gulch |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
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| 19.91 |
|
19.21 |
20.61 |
|
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