page_title: Dunkard Group
hierarchical_section_title: Dunkard Group
caption_attribution_description: Sandstone in the Permian of Ohio, USA. The Upper Pennsylvanian to Lower Permian Dunkard Group of Ohio contains the youngest bedrock in the entire state. The unit consists of two stratigraphic formations: the Washington Formation (below) and the Greene Formation (above). This is a cyclothemic, nonmarine succession principally composed of shales, sandstones, lacustrine limestones, and thin coal beds. This photo shows a sandstone interval in the Greene Formation. It occurs about 5 to 6 feet above the Nineveh Limestone. The massive-weathering unit is a calcareous, micaceous, quartzose sandstone about 6 feet thick. Below it is about 5.5 feet of thin-bedded siltstones and argillaceous sandstones. Stratigraphy: sandstone interval at top of unit GR16 of Cross et al. (1950), Greene Formation, upper Dunkard Group, Lower Permian Locality: Clark Hill section - roadcut on the southeastern side of Long Ridge Road, south of Oppossum Creek, south-southeast of the town of Clarington, southeastern Alum Township, eastern Monroe County, eastern Ohio, USA (GPS: 39° 43.676’ North latitude, 80° 51.018’ West longitude) Reference cited: Cross et al. (1950) - Field guide for the special field conference on the stratigraphy, sedimentation and nomenclature of the Upper Pennsylvanian and Lower Permian strata (Monongahela, Washington and Greene Series) in the northern portion of the Dunkard Basin of Ohio, West Virginia and Pennsylvania. 107 pp.
context_page_description: The Permian Dunkard Group 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.
context_section_description: 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.
caption: Sandstone (Greene Formation, Dunkard Group, Lower Permian; Monroe County, Ohio)
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