Harrell Shale


The Devonian Harrell Formation is a mapped bedrock unit in Pennsylvania, Maryland, West Virginia, and Virginia.

Description

The Harrell Formation was first described by Charles Butts in 1918. Hasson and Dennison state "The Harrell Shale consists of very dark gray, thinly laminated, platy- to sheety-weathering shale underlain in certain areas by the grayish black shale of the Burket Member."

Fossils

Hasson and Dennison reported the following fossils from several outcrops of the Harrell:
Type locality is at Horrell Station, Blair County, Pennsylvania.

Age

Relative age dating places the Harrell in the late Devonian.