Allegheny Group

Allegheny Group
Stratigraphic range: (Moscovian)
~
Bituminous coal (Clarion Coal) from the Allegheny Group, Ohio
TypeSedimentary
Sub-unitsFreeport Formation
Upper Freeport Coal
Upper Freeport Limestone Member
Butler Sandstone Member
Lower Freeport Coal
Freeport Sandstone Member

Kittanning Formation

Upper Kittanning Coal
Johnstone Limestone Member
Middle Kittanning Coal
Lower Kittanning Coal
Kittanning Sandstone Member
Vanport Limestone Member
UnderliesConemaugh Group
OverliesKanawha Formation and Pottsville Formation
Lithology
PrimarySandstone, coal
Location
RegionAppalachian Mountains
CountryUnited States
ExtentPennsylvania, Maryland, West Virginia, Ohio
Type section
Named byH. D. Rogers, 1840

The Allegheny Group, often termed the Allegheny Formation, is a Pennsylvanian-age geological unit in the Appalachian Plateau. It is a major coal-bearing unit in the eastern United States, extending through western and central Pennsylvania, western Maryland and West Virginia, and southeastern Ohio. Fossils of fishes such as Bandringa are known from the Kittaning Formation, which is part of the Allegheny Group.

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