Dunkard Group

Dunkard Group

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.[1] 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.

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.[1]

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

Contents

Fauna of the Dunkard Group

See also

Further reading

  • Anstey, Robert L.; Feldmann, Rodney M.; Hackathorn, Merrianne (1996). Fossils of Ohio. Columbus: State of Ohio, Dept. of Natural Resources, Division of Geological Survey. ISBN 0-931079-05-5. 

References

  1. ^ a b "Allegheny Plateau and Valley and Ridge". Geologic Map of Maryland. Maryland Geological Survey. 1968. http://www.mgs.md.gov/esic/geo/lgdalleg.html. Retrieved 2008-01-26. 



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