Traces of long-dead flora and fauna.
Mariopteris, most likely Mariopteris nervosa, a liana-type seed fern from the early Carboniferous.
Conifer cone from Poland.
Middle-Pennsylvanian Asterotheca miltoni from Mazon Creek, IL, USA.
Stromatolite from hypersaline Wilkins Peak Member of the Eocene Green River Formation, Wyoming. Collected at White Mountain escarpment:
Germany Valley, West Virginia. Ordovician carbonates with fossils.
Ordovician carbonates; the obverse of this sample: gigapan.com/gigapans/186325
Ordovician carbonates; the obverse of this sample: gigapan.com/gigapans/186379
Chaneysville member of the Devonian-aged Mahantango Formation, exposed near Hayfield, Virginia.
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