[Credited to A.W. Grabau.] Pg. 544, 550. Bullhead or Akron limestone. Probably = Amherstburg bed of Michigan and Cobleskill of eastern New York. Age is Silurian (Cayugan). Named from exposure in village of Akron, Erie Co., western NY.

Source: US geologic names lexicon (USGS Bull. 896, p. 20-21).

The equivalency of the Cobleskill and Akron was accepted by most geologists, who continued to apply Cobleskill to the dolomite of western New York as well as other parts of the State. C.A. Hartnagel, 1912 (New York State Hdbk., no. 19, p. 57) stated: Cobleskill limestone is absent along its line of outcrop across the State only in part of Albany County; in different parts of State it rests on Bertie, Brayman, Rosendale, Decker Ferry, and "Hudson River" formations. In 1917, however, G.H. Chadwick (GSA Bull, v. 28, p. 173-174) revived Akron dolomite for western New York stating: "The correlation eastward of the Akron with the Cobleskill remains to be worked out anew, but it is now believed to be substantially correct." The Geological Survey of Canada appears to employ Akron dolomite for this formation (See M.Y. Williams, 1919, Canadian Geol. Survey Mem. 111; and Cole, 1925, Ontario Dept. Mines 34th Ann. Rept., v. 34, pt. 2, p. 10), while the USGS designates it Cobleskill dolomite. Grabau stated it is same as his Greenfield limestone. (See under Greenfield limestone.)
H.L. Alling, 1928 (New York State Mus. Bull., no. 275, p. 21), showed Akron as younger than Cobleskill, and gave the sequence of beds given by Chadwick: Akron, Williamsville, Scajaquada (= Cobleskill), Falkirk, Oatka, but stated: Position of Cobleskill is still a matter of doubt. G.H. Chadwick, 1930 (GSA Bull., v. 41, p. 80-82), continued used of Akron dolomite.

Source: US geologic names lexicon (USGS Bull. 896, p. 20-21).

Pg. 343-344. Akron dolomite. Cobleskill limestone is a typical coral facies, and while it does not show the reef character it has the reef species. To the dolomitic phase in Erie County, western New York, the name Akron dolomite has been applied. The Akron dolomite is a little later faunal development than the Cobleskill. [Lists characteristic species of Cobleskill dolomite, also of Akron phase.]

Source: US geologic names lexicon (USGS Bull. 896, p. 20-21).

Akron Dolostone included in Bertie Group, but referred to as Akron-Cobleskill strata. Consists of very fine grained rocks in the Canadian sections and approaches a mottled waterlime in character. Included in Bertie because rocks are so similar to typical Bertie strata below, especially to the Victor Dolostone. Generally 3 to 5 m thick. Overlies Williamsville Formation. Age is Late Silurian.

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