Table opp. p. 61, p. 134. [Byham limestone member of Cuyahoga formation.] At base of Harvest Home shale member (lower Meadville shale of early reports) in several ravines south of Meadville, especially in Buchanan's Ravine, north of Shaws School (Buchanan Station) and about 1.5 mi west-northwest of Byham School, northwestern Pennsylvania, there is a limestone similar to West Mead limestone (lower Meadville limestone of early reports). It is proposed that this "middle Meadville limestone" be called Byham limestone. Resembles West Mead limestone lithologically and faunally, both being characterized by iron-ball concretions, fish bones, and a Syringothyrid fauna interspersed with inarticulate brachiopods. In area around Byham School it is 3 to 12 feet thick and much used in past for lime. Age is Mississippian.

Source: US geologic names lexicon (USGS Bull. 896, p. 306).