Marcellus Formation
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The Marcellus Formation or the Marcellus Shale is a Middle Devonian age unit of sedimentary rock found in eastern North America. Named for a distinctive outcrop near the village of Marcellus, New York, in the United States,
it extends throughout... Wikipedia
Area: about 90,000 square miles
Extent: 600 miles (970 km)
Other: Slate, limestone, sandstone, Tuff
Region: Appalachian Basin of; eastern North America
Thickness: up to 900 feet (270 m)
Unit of: Hamilton Group