Cincinnatian (Upper Ordovician) strata in eastern Hamilton County, Ohio, are grouped according to their respective clastic-ratio and bedding-index values. They are referred to the following lithic units in ascending order: Point Pleasant Member of the Lexington Formation (upper 3 m exposed), Kope Formation (73 m thick at one complete exposure), Fairview Formation (21-34 m thick), Miamitown Shale (as much as 3 m thick), and Bellevue Limestone (as much as 6 m exposed). The configurations of the Point Pleasant, Kope, and Bellevue are not known; the Fairview thins northward, whereas the Miamitown thickens in that direction. Structure contours generally trend at a large angle to isopachs except along an arcuate structural high east of a line between Columbia and Norwood. Lithi control of this high is suggested. Statistical analysis of cross-bedding in 14 pararipple sets indicates that paleocurrent flow in this area was directed southwest while the sediments of the Kope and Fairview Formations accumulated. An east- or northeast-trending shoal controlled the local distribution of lithosomes, although its influence may have decreased during deposition of the Miamitown Shale. Shifting positions of benthonic invertebrate colonies, of associated shallow depressions, and of wave and slightly changing current systems account for the formation of discontinuous limestone lenses intertongued with pelitic units.