Dunkard Group facts for kids

Quick facts for kids Dunkard Group Stratigraphic range: Pennsylvanian-Permian
Sandstone (Greene Formation, Dunkard Group, Lower Permian; Monroe County, Ohio)
Type	Group
Sub-units	Greene Formation, Waynesburg Formation, Washington Formation
Underlies	Igneous intrusives
Overlies	Monongahela Formation
Lithology
Primary	Shale, sandstone, siltstone, coal
Other	Limestone
Location
Region	Ohio,  Pennsylvania,  West Virginia, and  Maryland
Country	United States

The Permian Dunkard Group (Pd) is an area of rock, Early Permian in age, in the south of Ohio, southwestern Pennsylvania, West Virginia and the hilltops of the Georges Creek Basin of Maryland. In Ohio, it is found primarily in Washington County. It is notable for being one of the few areas of Permian sediment east of the Mississippi River. In addition, it is the youngest surface rock in the state of Ohio.

Description

It consists of red and green shale, siltstone, and sandstone, with thin lenticular beds of argillaceous limestone and thin beds of impure coal The base of the layer contains thick-bedded, white conglomeratic sandstone. The layer's thickness is greater than 200 feet in Maryland.

The fossils found in the Dunkard Group are similar to ones found in Texas and Oklahoma of similar age.

Fossil content