Brallier Formation

Brallier Formation Stratigraphic range: Late Devonian
Outcrop of Brallier Formation on north side of Pennsylvania Turnpike, central Bedford County, near Mile Marker 138
Type	sedimentary
Sub-units	Black Creek Siltstone Member, Minnehaha Springs Member
Underlies	Scherr Formation
Overlies	Harrell Formation
Thickness	1350 to 1800 feet in central PA
Lithology
Primary	shale, sandstone
Location
Region	Appalachian Mountains
Country	United States
Type section
Named by	Charles Butts, 1918

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

The Brallier Formation was described by Charles Butts in 1918 as a fine-grained, siliceous shale with few fine-grained sandstone layers, from outcrops in central Pennsylvania. Others expanded usage of the term to rocks in other states.

The Brallier is roughly equivalent to the Scherr Formation.

The contact with the underlying Harrell Formation is generally gradational.

Hasson and Dennison reported the following fossils from outcrops of the lower Brallier at Keyser, West Virginia, Ridgeville, West Virginia, and McCoole, Maryland:

Type locality is at a railway station 6 miles northeast of Everett, Bedford County, Pennsylvania.

Relative age dating places the Brallier in the late Devonian.