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GeoGirls Examing Tephra Deposits

By Communications and Publishing August 2018 (approx.)
overhead view of girls sitting around a table wring on data sheets, samples in plastic tubs cover the table.
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Detailed Description

The GeoGirls examined tephra (ash and pumice) deposits from Mount St. Helens’ eruptive past and learned how to create a stratigraphic column.

Sources/Usage

Public Domain.