Knowledge (XXG)

Conococheague Formation

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Orndorff, R.C., 1988, Latest Cambrian and earliest Ordovician conodonts from the Conococheague and Stonehenge limestones of northwestern Virginia, IN Sando, W.J., ed., Shorter contributions to paleontology and stratigraphy: U.S. Geological Survey Bulletin, 1837-A, p.
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at this site is nearly vertical, with the strike nearly perpendicular to the highway, and thus one can easily walk up and down the sections.
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along the Maryland bank of the Potomac. In Shepherdstown itself, the top of a Conococheague cliff provides the setting for the monument to
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Means, John. 2010, Roadside Geology of Maryland, Delaware, and Washington, D.C. Mountain Press, Missoula, Montana. x+346 pp.
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Accessible outcrops occur along various roadcuts and waterways in the area, including roadcuts near mile marker 20 of
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expose mile-long sections of tilted Conococheague strata. These may be easily seen from the towpath trail of the
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Stose, G.W., 1908, The Cambro-Ordovician limestones of the Appalachian Valley in southern Pennsylvania:
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by A. C. Dooley, Jr., JEFFERSONIANA, Number 19, 10 January 2009, Virginia Museum of Natural History
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Unusual Cambrian Thrombolites from the Boxley Blue Ridge Quarry, Bedford County, Virginia
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of the Conococheague was most likely shallow marine to tidal on a carbonate platform.
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Relative-age dating of the Conococheague places it in the Upper
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Etched section of rock from the Conococheague Formation from
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Index

Conococheague Limestone
Stratigraphic range
Cambrian

Washington County, Maryland
Beekmantown Dolomite
Elbrook Formation
Limestone
dolomite
Appalachian Basin
North America
Conococheague Creek
Appalachian
Cambrian
limestone
dolomite
Maryland
Pennsylvania
Virginia
West Virginia

Antietam Creek
Hagerstown

I-70
depositional environment
Scotland
Franklin County, Pennsylvania
Chambersburg
I-70

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