Woodford Shale

ARDMORE-SHERMAN- Shale, black, fissile, cherty; thickness, 160 to 560 feet, increasing southward. Occurs in the ARBUCKLE MTNS.
State Oklahoma
Name Woodford Shale
Geologic age Late Devonian
Lithologic constituents
Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed)
Comments First published use in Atoka quad, Johnston and Atoka Cos, OK, South Oklahoma folded belt and Ouachita tectonic belt provinces. Intent to name not stated; probably named for town of Woodford, Carter Co, OK. No type locality designated. Exposed in northwestern part of Atoka quad. Forms low ridges and hills, Composed of thin strata of dark chert, cherty shale, and black, fissile, bituminous shale aggregating 500-700 ft in thickness. Is variable as to thickness and position of beds. Locally, chert makes up large part of the formation; elsewhere it is largely siliceous black shale. Concretions of flint found near base. Some cherty beds approach siliceous limestone. (Taff, 1902).
NGMDB product
Counties Atoka - Bryan - Carter - Coal - Garvin - Grady - Johnston - Love - McClain - Marshall - Murray - Pontotoc - Stephens