The Antietam Formation or Antietam Sandstone is a geologic formation in Pennsylvania, Maryland and West Virginia.[2][3][4] It is largely quartz sandstone with some quartzite and quartz schist. It preserves Skolithos trace fossils dating back to the Cambrian Period.[5]
This article about a specific stratigraphic formation in West Virginia is a stub. You can help Wikipedia by expanding it.
This article about a specific stratigraphic formation in Pennsylvania is a stub. You can help Wikipedia by expanding it.
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