Spafford member of Ludlowville formation named in this report for exposures just north of Spafford Landing, central NY. Approximately 25 ft thick. Unit is a relatively fine and very fossiliferous shale overlying the Ivy Point member (new) and underlying the SPIRIFER TULLIUS zone of the Owasco member (new) of the Ludlowville. Age is Middle Devonian.

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

Near Skaneateles Lake, the Spafford Member consists of 4 to 5 m of brachiopod-bivalve-rich shale that grades upward into sparsely fossiliferous silty mudstone and siltstone. The unit extends eastward to the Chenango Valley with little facies change. Until recently it was not recognized west of Owasco Lake. However, Mayer and others (1990) traced the Spafford westward into the Cayuga and Seneca Lake region where it is a 7 to 8-m interval of sparsely fossiliferous siliciclastic mudstone that contains undescribed problematical fossils. Farther west the member becomes a thin tongue of shale, which was formerly assigned to the underlying Wanakah Member. It is marked at the base from Bethany Center in Genesee Co. eastward into the Cayuga Valley by the newly named Limerick Road Bed, an 18- to 157-cm-thick fossiliferous calcareous to siliciclastic mudstone. In central NY it underlies the Owasco Siltstone Member and in western NY, the correlative Hills Gulch Bed of the Jaycox Member. Age is Middle Devonian.

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