Antietam Formation

Updated on Dec 21, 2024

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Type Formation Other Schist Thickness 168 m Underlies Tomstown Dolomite Primary Sandstone, Quartzite		Overlies Harpers Formation Country United States Named for Antietam Creek Unit of Chilhowee Group

Region West Virginia, Pennsylvania, Maryland

The Antietam Formation or Antietam Sandstone is a geologic formation in Pennsylvania, Maryland and West Virginia. It is largely quartz sandstone with some quartzite and quartz schist. It preserves Skolithos trace fossils dating back to the Cambrian Period.

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