Sample: UA1124
| Sample ID: | UA1124 [1] [2] [3] [4] |
| Station ID: | Palisades_Site_B |
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| Volcano: | |
| Possible source: | |
| Eruption: | Old Crow Tephra |
| Collector: | Froese, D. G. |
| Date sampled: | |
| Sample type 1: | Tephra Fall |
| Color: | |
| Final unit: | |
| Text Description: | Tephra occurs ~25 m above river level and is 3.5 m below woody, organic-rich silt and peat that host abundant and exceptionally well-preserved large stumps and logs. The tephra is up to 10 cm thick and has sharp upper and lower contacts with the surrounding grey silt, which is massive and contains rare rootlets as well as local orange mottling and thin wavy organic laminae. The tephra bed is not uniformly tabular; locally it is offset by cm-scale faults, or appears as stretched pods or lenses. At least two frost cracks, including one ~12 cm long, incorporate wisps of tephra and small angular blocks of silt. The tephra and the wood/peat horizon are separated by massive and faintly laminated grey silt. |
| Sample Location: |