Morse, W.C., 1928, Paleozoic rocks of Mississippi: Journal of Geology, v. 36, no. 1, p. 31-43.
Whetstone Branch shale named in Tishomingo Co., northeastern MS. Consists largely of black shale, but contains some sandy shale and a few thin sandstones. At a number of places is represented by a rather prominent sandstone layer with a conglomeratic base resting unconformably on older formations, but at other places typical black shale underlies and overlies the sandstone. Belongs to lower and greater part of Chattanooga shale of type locality. Unconformably underlies Carmack limestone and unconformably overlies Island Hill formation. Named for picturesque tributary of Tennessee River. Contains Devonian fossils.
Source: GNU records (USGS DDS-6; Reston GNULEX).
Type locality given. Thickness of Whetstone Branch shale ranges from 0 to 31.5 ft.
Source: GNU records (USGS DDS-6; Reston GNULEX).
Whetstone Branch formation is local designation for Chattanooga shale, which contains interbedded sandstones in this area. Occurrence of TENTACULITES seems to prove Devonian age of at least part of this formation, but middle New Albany conodonts have been recognized nearby in Tennessee, so the upper part may be younger. Age shown on chart is Kinderhookian.
Source: GNU records (USGS DDS-6; Reston GNULEX).
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