Bald Eagle Formation

Bald Eagle Formation
Stratigraphic range: Late Ordovician
Outcrop of Bald Eagle Formation, where Rt. 164 crosses Tussey Mountain, Blair County, Pennsylvania
Typesedimentary
UnderliesJuniata Formation
OverliesReedsville Formation
Thickness275 +/-25 m[1]
Lithology
Primarysandstone
Otherconglomerate, shale
Location
RegionAppalachian Mountains
ExtentPennsylvania, Maryland, West Virginia
Type section
Named forBald Eagle Mountain, Pennsylvania
Named byA. W. Grabau[2]

The Ordovician Bald Eagle Formation is a mapped bedrock unit in central Pennsylvania, USA. It is a ridge-forming unit in the Appalachian Mountains.

  1. ^ Faill, R.T., Glover, A.D., and Way, J.H., 1989, Geology and mineral resources of the Blandburg, Tipton, Altoona, and Bellwood quadrangles, Blair, Cambria, Clearfield and Centre Counties, Pennsylvania: Pennsylvania Geological Survey Topographic and Geologic Atlas, 4th series, 86, 209 p., scale 1:24,000 and 1:48,000
  2. ^ Grabau, A.W., 1909, Physical and faunal evolution of North America during Ordovicic, Siluric, and Early Devonic time: Journal of Geology, v. 17, p. 209-252.