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Antietam Formation

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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
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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.

References

Antietam Formation Wikipedia


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