In the Greendale syncline in Hawkins and Grainger Cos., TN, Mississippian strata previously termed Newman Limestone (Hardeman and others, 1966) are isolated from the Newman Limestone in the Newman Ridge syncline. Part of these rocks are here named the Fisher Creek Formation. The Fisher Creek consists of limestone and subordinate sandstone and is subdivided into an informal lower member (informal Fisher Creek formation of Sanders, 1952), a middle sandstone member (informal Alumwell sandstone of Sanders, 1952), and an upper member (informal Marshall Creek formation of Sanders, 1952). Overlies the Gilliam Creek Limestone; sharply underlies the Fido Sandstone. Thickness is 450 m (1,500 ft). Age is Mississippian.

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