Traces of long-dead flora and fauna.
Fossil from the collection of biology professor Lisa Williams at Northern Virginia Community College.
Fossil from the Ward's teaching collection of the geology department at Northern Virginia Community College.
Fossil from the collection of Lisa Williams, biology professor at Northern Virginia Community College.
A sample of the fern Neuropteris from a nodule in the Mazon Creek area.
Image capture by Graham Bird of GIGAmacro.
Specimen of the feeding trace fossil Zoophycos, from Devonian-aged Mahantango Formation of the Fort Valley, Shenandoah County, Virginia.
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