Pg. 151. Davistown sandstone of Washington group. Medium- to heavy-bedded, medium-grained brown shaly sandstone. Thickness 10 to 30 feet. Lies 320 feet above Waynesburg coal and a short distance between Jollytown coal. Probable that in parts of West Virginia where Middle Washington limestone is lacking, this sandstone may have been included in Upper Marietta, but from type section given by Hennen, the Upper Marietta is confined to sandstone lying below a calcareous shale which is probable equivalent of Middle Washington limestone rather than bed so called in Hennen's (1909, West Virginia Geol. Survey County Rept. Marshall, Tyler, and Wetzel Counties) section. Therefore, in section where Middle Washington limestone is well developed, it seems preferable that Upper Marietta be confined to sandstone strata below this limestone, and that sandstone above it be given another name. [Age is Permian.]
Named from quarry in the sandstone just north of National Pike at Davistown, Greene Co., PA.

Source: US geologic names lexicon (USGS Bull. 1200, p. 1050-1051).

Pg. 53 (fig. 1-141). Columnar section of Lower Dunkard (Washington series) in Ohio River valley, West Virginia, shows Davistown sandstone above Upper Marietta sandstone and below Upper Washington limestone. [Age is Permian.]

Source: US geologic names lexicon (USGS Bull. 1200, p. 1050-1051).