Shepherd Grove Formation extended northeastward where identified in Myrtle Beach, SC, corehole. Consists of 15 ft of grayish-olive-green, calcareous, silty and sandy clay overlying Middendorf Formation. Although lithologically similar to Middendorf, has significantly reduced faunal and floral diversity and abundance. Table 1 provides list of calcareous nannofossils and ostracodes.

Source: GNU records (USGS DDS-6; Reston GNULEX).

Pg. 11 (fig. 8), 19, 21, 29, 31 (fig. 22), 33. Shepherd Grove Formation. Occurs in subsurface of southern Dorchester County, southeastern South Carolina. Sediments previously included in the Black Creek Formation by Hazel and others (1977) and Gohn and others (1977). Consists mostly of gray-green, calcareous clays and silts. Thickness 110 feet at type. Overlies Middendorf Formation; underlies Caddin Formation (new). Age is Late Cretaceous (late Santonian to early Campanian; Austinian Provincial Age; DICARINELLA ASYMETRICA planktic foram zone, CALCULITES OBSCURUS to ASPIDOLITHUS PARCUS (NC17 to NC18) calcareous nannofossil zone, VEENIA QUADRIALIRA to ALATACYTHERE CHEETHAMI ostracode zone).
Type section (subsurface): depth-interval 1,644 to 1,754 ft, Clubhouse Crossroads No. 1 drill core, near Clubhouse Crossroads, Dorchester Co., southeastern SC. Named from Shepherd Grove Cemetery, about 3 mi north of drill site.

Source: Publication.