Take a good, close look at sand, ash, and other sediments.
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Passage Creek drains Fort Valley and samples the rocks of the Massanutten Synclinorium. How many can you identify?
A Petri dish full of debris from surface crevices on the Kilauea Volcano: a sample from the NOVA collection.
sand made of biotite and quartz
With two bonus gastropods.
Sample collected and contributed by Glib Shpychka.
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