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]

Antietam Formation
Stratigraphic range: Cambrian
Anticline in schist of Antietam Formation
TypeFormation
Unit ofChilhowee Group
UnderliesTomstown Dolomite
OverliesHarpers Formation
Thickness550 ft
Lithology
PrimarySandstone, quartzite
OtherSchist
Location
RegionAppalachia, Eastern United States, and Southeastern United States
CountryUnited States
ExtentMaryland, Pennsylvania, Virginia,[1] and West Virginia
Type section
Named forAntietam Creek

References

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  1. ^ Paleozoic Sedimentary Successions of the Virginia Valley & Ridge and Plateau
  2. ^ Antietam Formation in West Virginia, USGS
  3. ^ Antietam Formation in Pennsylvania, USGS
  4. ^ Maryland Geological Survey, Volume 10, Johns Hopkins Press, 1918 p. 200
  5. ^ "Geology of West Virginia's Blue Ridge". Archived from the original on 2016-03-04. Retrieved 2015-03-25.