Geology you can hold in your hand.
Lycopsid bark from the Pennsylvanian-age Allegheny Formation, collected on Corridor H in West Virginia.
Eocence-aged basalt from the Mole Hill volcanic neck in Rockingham County, VA.
Migmatite from Orange Springs Farm, near Unionville, Virginia. Partial melting of this schist occurred during the late Ordovician Taconian Orogeny (~460 Ma). Sample courtesy T. Keller Grayson.
Eocene-aged hypabyssal andesite with anorthosite xenolith dated to ~1.4 Ga. Possible Grenvillian-age crust under Cristo Rey.
A slab of differentially-weathered Archean gneiss from the Spanish Peaks region of the Gallatin Range, Montana. Part of the Wyoming Craton.
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