Pg. 93, 97. Hardesty shale. [For definition see first entry under Pedee group. Origin of name not stated. The shale to which this name was applied is basal part of Lawrence shale of previous usage, which Moore ehre divided into (descending) Lawrence shale [restricted], Haskell limestone, Stranger formation, resting unconformably on Hardesty shale. This classification was followed by Moore and Condra in their Oct. 1932 revised chart of Pennsylvanian of Kansas and Nebraska, and by N.D. Newell, 1935 (Kansas Geol. Survey Bull., no. 21). See "Modern classifications of the Pennsylvanian rocks of eastern Kansas and southeastern Nebraska," compiled by M.G. Wilmarth, Secretary of Committee on Geologic Names, USGS unpub. corr. chart, Oct. 1936, sheet 2.]

Source: US geologic names lexicon (USGS Bull. 896, p. 908); GNC KS-NE Pennsylvanian Corr. Chart, sheet 2, Oct. 1936.

Pg. 138. Hardesty shale was not properly proposed as a stratigraphic unit, being merely indicated in a chart, and has no standing. It is abandoned. Top of Pedee group is top of Iatan limestone, although it is probable that in places there is a certain thickness of shale between Iatan limestone and the post-Missouri disconformity that should be included in Pedee group. [See further under Pedee group.]

Source: US geologic names lexicon (USGS Bull. 896, p. 908); GNC KS-NE Pennsylvanian Corr. Chart, sheet 2, Oct. 1936.