Geology of the Elkton area, Virginia

Stratigraphic framework of Cambrian and Ordovician rocks in the central Appalachian basin from Morrow County, Ohio, to Pendleton County, West Virginia

“…East of the Allegheny structural front, the basal sandstone unit and the Shady Dolomite interval presumably correlate with the uppermost part of the Lower Cambrian Chilhowee Group and the Lower Cambrian Shady Dolomite that crops out in northern Virginia between the North Mountain fault and the Blue Ridge, respectively (figs. 1, 2) (Butts, 1940;King, 1950;Brent, 1960;Rader, 1982).…”

“…1) and (2) published outcrop descriptions of the Rome and Waynesboro Formations in northern Virginia between the North Mountain fault and the Blue Ridge (King, 1950;Edmundson and Nunan, 1973;Gathright and Nystrom, 1974). These data suggest that, east of the Rome trough, the Rome Formation and equivalent units thin abruptly across the Central West Virginia arch before they thicken eastward to an estimated 1,600 ft near the Allegheny structural front (pi.…”

“…9674-T Mineral Tract drill hole. First, the Waynesboro (Rome) Formation in northern Virginia has been assigned an Early Cambrian age by King (1950) and Rodgers (1956). Second, on the basis of fossils, Butts (1940) concluded that the Rome Formation in central Virginia is Early and Middle Cambrian in age.…”

“…Approximately 25 mi east of the UFS drill hole, on the eastern side of the North Mountain fault in northern Virginia ( fig. 1), the Gatesburg Formation correlates with a 2,500-to 3,000-ft-thick sequence of sandy limestone and dolomite that was identified as the Conococheague Formation (Limestone) (Butts, 1940;King, 1950;Wilson, 1952;Edmundson and Nunan, 1973;Young and Rader, 1974;Rader and Biggs, 1976;Rader, 1982) (fig. 2).…”

“…1). Names applied to these strata include (1) Chepultepec Limestone and Beekmantown Group (Butts, 1940), (2) Beekmantown Dolomite (includes Chepultepec Limestone at base) (King, 1950) …”