Sharon Conglomerate

Geologic formation in the United States

Sharon Conglomerate

Stratigraphic range: Pennsylvanian

Outcrop of the Sharon Conglomerate at the Ledges, Cuyahoga Valley National Park

Type| Sedimentary
Unit of| Pottsville Formation
Overlies| Meadville Shale
Lithology
Primary| conglomerate
Location
Region| Pennsylvania
Country| United States
Extent| Pennsylvania, Ohio, Maryland
Type section
Named for| Sharon, Pennsylvania

The Sharon Conglomerate is a geologic formation of early Pennsylvanian age in Pennsylvania, Ohio, and Maryland, in the United States. It is dominantly conglomerate and quartzarenite sandstone. In places it is abundantly crossbedded.

The Sharon Conglomerate is generally considered a Member of the Pottsville Formation in Pennsylvania and Maryland,[1] but it is a Formation in Ohio.

## Exposures

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The Sharon conglomerate has no formal type section,[2] although it is named after the town of Sharon, Pennsylvania.

One excellent exposure is located in Cuyahoga Valley National Park at "the Ledges," located southeast of the town of Peninsula, Ohio. Another exposure is at Mary Campbell Cave near Cuyahoga Falls.

Geologic cross section at Cuyahoga Valley National Park showing the Sharon Conglomerate at upper right (stratigraphic top).[3]

* Outcrop near Jackson, Ohio showing the Sharon unconformably overlying the Borden Formation

* Mudshale clasts in one of the roadcuts near Jackson. Rock hammer for scale.

* Exposure at Mary Campbell Cave

## References

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1. ^ Lyons, P.C., Jacobsen, E.F., and Scott, B.K., 1985. Coal geology of the Castleman coal field, Garrett County, Maryland, U.S. Geological Survey, Coal Investigations Map C-98. Scale: 1:24,000. link.
2. ^ Sharon, National Geologic Map Database, Geologic Unit: Sharon
3. ^ Cushing, H.P.; Leverett, Frank; Van Horn, Frank (1931). Geology and Mineral Resources of the Cleveland District, Ohio, USGS Bulletin 818. Washington: US Government Printing Office.

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