Tomstown Dolomite

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Tomstown Dolomite
Stratigraphic range: Cambrian
Type Formation
Underlies Rome Group and Waynesboro Formation
Overlies Antietam Formation and Chilhowee Group
Thickness200 - 1000 feet
Lithology
Primary dolomite
Other Chert, limestone, shale
Location
Region Appalachia, Mid-Atlantic United States, and Southeastern United States
Country United States
Extent Maryland, Pennsylvania, Virginia, [1] West Virginia

The Tomstown Dolomite or Tomstown Formation is a geologic formation in Maryland, Pennsylvania, Virginia and West Virginia. [2] [3] [4] It preserves fossils dating to the Cambrian Period.

In Maryland it is described as "Interbedded light gray to yellowish-gray, thin- to thick-bedded dolomite and limestone; some shale layers; gradational contact with Antietam; thickness 200 to 1,000 feet." [2]

See also

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