Pg. 69. Beds of Chemung age in Cattaraugus County, [western New York], divided as follows (descending): Cuba sandstone; Machias (=Northeast shale of Chautauqua County); unnamed sandstone; Gowanda beds; and Dunkirk shale. [Age is Late Devonian.]

Source: US geologic names lexicon (USGS Bull. 896, p. 1253).

Pg. 152. Northeast shale is nearly barren to west, but to east it contains an easily recognized fauna, best exhibited in Pierce quarry, west of Machias, [Cattaraugus County, western New York]. The Machias fauna is present in road hill south of Persia turnout and at least as far west as south of Wango. It is fully developed in railway cut at Cattaraugus. In all these localities it involves the Northeast beds from top downward, and the change is lithologic as well as faunal. Apparently the Northeast (Machias) embraces those beds which on Genesee River intervene between the heavy sandstones of Caneadea and the Cuba sandstone and which become the main mass of Wellsburg sandstone. Farther east the Cuba sandstone goes above Machias-Northeast series. [Age is Late Devonian.]

Source: US geologic names lexicon (USGS Bull. 896, p. 1253).

(No. 3, p. 189-204, Oct. 1933.) Pg. 200. Shows Machias as overlain by Cuba sandstone, underlain by Rushford sandstone, and as = Northeast shale. On p. 202 he states that the Machias is a fossiliferous phase of Northeast shale containing many bryozoans. [Age is Late Devonian.]

Source: US geologic names lexicon (USGS Bull. 896, p. 1253).