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Text Description: Only present at Site B of Chester Bluff. VT tephra is the upper-most tephra at Site B and is deposited in loose, reworked loess with modern root penetration. VT is wispy, gray, up to 0.5 cm thick, with slightly diffuse contacts, and continuous across 2m. Richer in frothy pumice and have fewer bubble-walled and tri-cuspate shards. Rare phenocrysts (<20%) are dominated by ortho- and clino-pyroxenes, and very rarely contain green amphibole. References:  An extensive middle to late Pleistocene tephrochronologic record from east-central Alaska Tephrochronology of middle to late Pleistocene loess in east-central Alaska |
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