The Foreknobs Formation contains massive sandstones; siltstone; "redbeds" of brownish-gray sandstone, siltstone, and shale containing scattered marine fossils; and occasional quartz-pebble conglomerate or conglomeratic sandstone beds.

De Witt (1974) extended the Scherr and Foreknobs into Pennsylvania, but did not use the term Greenland Gap Group.

[4] Rossbach and Dennison (1994) extended the Foreknobs into the Catawba syncline of southwestern Virginia.

Type section: along WV Highway 42, 0.48 km northwest of Scherr, Grant County, West Virginia Relative age dating places the Foreknobs in the Late Devonian.

This article about a specific stratigraphic formation in Maryland is a stub.