The Devonian Brallier Formation is a mapped bedrock unit in Pennsylvania , Maryland , West Virginia , and Virginia .
5-477: 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
10-786: The Brallier in the late Devonian . Loyalsburg Formation This article about a specific stratigraphic formation in the United States is a stub . You can help Misplaced Pages by expanding it . Scherr Formation The Devonian Scherr Formation is a mapped bedrock unit in Pennsylvania , Maryland , Virginia and West Virginia . The Scherr Formation consists predominantly of siltstone and shale . Lower part of unit includes considerable fine-grained sandstone , while upper two thirds contains almost no sandstone. It weathers light olive gray. Dennison (1970) renamed
15-610: The Greenland Gap Formation. The Minnehaha Springs Member is a " clastic bundle" consisting of interbedded medium gray siltstone and olive-gray shale with some grayish-red siltstone and shale and some sandstone. It is interpreted as turbidites . This same member is proposed to exist at the base of the Scherr's lateral equivalent, the Lock Haven Formation . Relative age dating places the Scherr in
20-625: 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 . A large exposure is located in Huntingdon , Pennsylvania, along the ramp from U.S. Route 22 west to Route 26 north. Another good exposure is on the Pennsylvania Railroad bed just west of Altoona , Pennsylvania. Relative age dating places
25-504: The old Chemung Formation the Greenland Gap Group and divided it into the lower Scherr Formation and the upper Foreknobs Formation . De Witt (1974) extended the Scherr and Foreknobs into Pennsylvania but did not use the term Greenland Gap Group. Boswell et al. (1987), does not recognize the Scherr and Foreknobs Formations in the subsurface of West Virginia, and thus, these formations are reduced from "group" to "formation" as
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