22 



NEW YORK STATE MUSEUM 



Corners; at the forks of Indian creek a mile north of Willard and 

 on the west side of Seneca lake in a small ravine i l / 2 miles north of 

 Dresden 6 rods above the New York Central Railroad and at the 

 crest of the middle falls in the ravine of Kashong creek. 



Moscow shale 



This term was applied by Hall in the Third Annual Report of 

 the Fourth District, page 298, to the shales that succeed the Tichenor 

 limestone and are terminated above by the Tully limestone. Fol- 

 lowing a description of this, the upper division of the Hamilton 

 group, as it appears in Seneca county along the shores of Seneca 

 and Cayuga lakes, he says : " This shale is so well developed, and 

 contains the fossils, particularly the trilobites, in such great per- 

 fection, at Moscow, Livingston co., that I have given it that 

 name. . . " 



As developed on these quadrangles the formation may be de- 

 scribed as a soft mass of gray calcareous shale, very fossiliferous 

 and light colored in the lower beds, the upper being darker, more 

 argillaceous and containing fewer and smaller fossils. As a whole 

 the formation generally assumes the character of the lower beds in 

 a westerly direction and of the upper beds toward the east. At 

 Moscow the dark upper beds are but 11 feet thick while on these 

 quadrangles they constitute about one third the thickness of the 

 formation and in Onondaga and Madison counties, they occupy all 

 of the space but a few feet at the bottom, between the horizon of 

 Tichenor and the Tully limestone. 



Concretionary calcareous layers, some of which are continuous 

 for a considerable distance, while others extend but a few feet, com- 

 posed of an agglomeration of fossils are of frequent occurrence in 

 the lower beds and to a much less degree in the upper, and irregu- 

 larly formed concretions, also containing many fossils, are common 

 throughout the entire formation. 



The list of fossils that compose the fauna of the Moscow shales 

 in the Canandaigua lake section published in Museum bulletin 63, 

 contains 6 worms, 18 crustaceans, 7 cephalopods, 3 pteropods, 21 

 gastropods, 34 lamellibranchs, 52 brachiopods, 18 bryozoans, 5 corals 

 and 26 crinoids, a total of 190 species. 



Exposures in which the entire section of the Moscow shales are 

 accessible may be found in several ravines 1 to 2 miles east of 

 ] [ayt Corners. The lower part is displayed along Indian creek 



