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Sample CAL8
NavDat sample number 54392 · TUFF
Sample
| Sample ID | CAL8 |
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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] Northwest corner of intersection of Hwy. 49 and 26. Fills channel cut in older tuff and basement. CAL 8 is just below the devitrified zone. Poorly to moderately wleded nearly aphyric Nine HIll Tuff. Glassy portion moderately pumiceous, devitrified portion pumice poor. Glassy and devitrified tuffs separated bya sharp interface, and probalby are sperarte flow untis. Devitrification in devitrified zone is incomplete. About 13 m thick; no overlying tuff. |
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Location
| Latitude | 38.2945 |
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| Longitude | -120.701 |
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| State / province | California |
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| Location comment | Nine Hill |
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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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