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]
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Tight folds in the schist of Antietam Formation -
Thin section of schist. Porphyroblastic biotite, a, in a dolomitic matrix. The tourmaline, t, is epigenetic.
References
- ^ Paleozoic Sedimentary Successions of the Virginia Valley & Ridge and Plateau
- ^ Antietam Formation in West Virginia, USGS
- ^ Antietam Formation in Pennsylvania, USGS
- ^ Maryland Geological Survey, Volume 10, Johns Hopkins Press, 1918 p. 200
- ^ "Geology of West Virginia's Blue Ridge". Archived from the original on 2016-03-04. Retrieved 2015-03-25.
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