Geology you can hold in your hand.
with stylolites and primary sedimentary features
Imaged at NOVA Annandale by Robin Rohrback-Schiavone as part of the Paleoplant Project.
It looks like it's the same thing as the lower unit (below the unconformity) at Siccar Point - a graywacke.
Fossil cone from Wise County, VA.
Evidence of Neoproterozoic glaciation overprinted by Appalachian mountain-building.
Other samples from the same site:
Selected locations showing truncated cross bed sets are labeled.
Proterozoic dike with big feldspars.
Obverse of the sample here:
An example courtesy of Allen Fraser, local geology expert.
To explore a gigapan of the roadcut where this sample was collected, click here:
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