Found at Site D2, within the MIS 5e forest bed (~45 m above river level), which contains large Picea logs that are locally upright and rooted (Reyes and others, 2010). The tephra is white to pink, and is present as discontinuous pods up to 1 cm thick. Glass shards are typically tri-cuspate or bubble walled. Pumice is also present and commonly elongate, and brown glass is present. Mineralogy consists largely of orthopyroxene and plagioclase.
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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