Named from town of Tallant, Osage Co, OK, Chautauqua platform. No type locality designated. Has been mapped southward to sec 28, T13N, R8E. Occurs from T23N to the KS-OK state line. Consists of sandstone and shale. Many of the sandstone beds are fine grained and tightly cemented; locally some are moderately coarse grained and poorly sorted. Thickness varies from approximately 0 ft to 400 ft in this report area. Divided into (ascending) the Bigheart sandstone member, at base, which is separated from the Revard sandstone member by unnamed shales. The Revard is overlain by unnamed shale with lenticular sandstone bodies. Also there are other sandstone units some of which may be extensive enough to be mapped, eventually, as members. Unconformably underlies Vamoosa formation; conformably overlies Barnsdall formation. Cross sections. Barnsdall-Tallant formations correlate with Weston shale of KS. Tallant, if present underground to the west, probably included in Tonkawa sand. Of Pennsylvanian, Missouri age.

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