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Sample 8YC-477B
NavDat sample number 61972 · PYROCLASTIC-FALL
Sample
| Sample ID | 8YC-477B |
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| Rock name | PYROCLASTIC-FALL |
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| Rock type | VOLCANIC |
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| Composition | FELSIC |
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| Material | IGNEOUS |
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| Comment | Vitrophyric fused FALLOUT tuff about 11 m above section base; black slightly perlitic glass with moderately abundant phenocrysts of quartz and oligoclase in welded shard and pumice matrix |
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Location
| Latitude | 44.7577 |
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| Longitude | -110.404 |
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| Location | Sulphur Creek; base of cliff about 0.9 km north of Sevenmile Hole in the Grand Canyon of the Yellowstone |
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| State / province | Wyoming |
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| Volcanic field | Plateau Rhyolite, Upper Basin Member, Tuff of Sulphur Creek |
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Age
| Age (Ma) | Error | Min | Max | Geologic age | Dated by |
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| 0.479 |
|
0.469 |
0.489 |
|
|
