Authors informally propose two dominant, widespread facies of the Edgecliff Member of the Onondaga Limestone: the cherty, micritic Clarence facies, formerly known as the Clarence Member of western NY, and a coarse crinoidal, non- to sparsely cherty Jamesville Quarry facies. The Jamesville Quarry is present at the Edgecliff type locality near Syracuse, where it reaches a thickness of about 5.7 m. A basal bed or tongue of the Jamesville Quarry facies is present in nearly all "Clarence facies" dominated sections of the Edgecliff in NY and equivalent strata in northeastern PA. Age is Middle Devonian (Eifelian).

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