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Sample ID:UA2134
Station ID:Jensen_Palisades_East
Sample Type 1:Tephra Fall
Field Lithology:Rhyolite
Text Description:
Collected ~25 m above river level on the west side of a major gully that forms Site E (Reyes and others, 2011). The white tephra bed was reworked into pods up to 2.5 cm thick and 30 cm long, 15 cm above a cryoturbated peaty soil with a distinct B-horizon. The tephra was not in direct stratigraphic association with any other tephra, though OCt was found on the eastern side of the gully ~15 m above river level (Reyes and others, 2011). Glass morphology dominated by tri-cuspate and bubble-walled shards and thick-walled pumice. Glass shards are relatively blocky, and microlites were common.

The Palisades is a key reference site for the middle Pleistocene of eastern Beringia: new evidence from paleomagnetics and regional tephrostratigraphy


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