88 rochhsikr academy ok science. [j^tl- i i. 



Section of Well No. 2 at Le Roy, New York, eic.htken milks 

 NORTH OF Warsaw. 



Approximate altitude <S63' A. T. (') 



DEPTH, "^""j^l^" KIND OF ROCK. FORMATION. 



22' Soil. 

 22' 



I r Marcellus shale. 

 3:^' 



137' Corniferous limestone. Upper Helderberg. 



170' Lower Helderberg. 



440' Limestone and shales. 1 p^ '^ 



610' Brine in shale mixed with salt. i ^ o 



990' Niagara limestone and bottom of well. (") J ? "p 



In the latter part of 1887 a well was drilled at PJatavia, ten miles 

 west of Le Roy, and through the kindness of Mr. D. L. Dodgson of 

 that town, a set of samples was obtained for examination. The well 

 is located south of the village on the bank of Tonawanda creek and is 

 reported as six feet lower than the station of the N Y. Central cV' 

 Hudson River R. R. According to Ciannett the elevation of the 

 Batavia station is 895' A. T., {") which would make the mouth of the 

 Batavia well 889' A. T. 



Detailed Record of the Batavia Well, at Batavia, 

 (iENESEE Co., New York. 



NO. of description of 



SAMPLE. DEPTH. SAMPLE. 



1. 40'. Black, argillaceous shale, with dark brown streak ; one 



chip with iron pj'rites. Marcellus. 



2. 100'. Mainly light gray limestone chips ; but with some 



dark gray. Strong effervescence in cold HCl. 

 Upper Helderberg. 



3. 150'. Mainly dark gray limestone mixed with chert ; some 



light gray chips. (') 



ii.) lliid.. Chart No. III. 



(2.) The section is compiled from data published by Prof. Bishop (5th Ann. Rept. State 

 OeoIoKist [of New \ork] for 1885, p. 19). 



(3.) Bull. II. S. Geol. Surv., No. 76, p. 4,;. 



(4.) Prof. Hal! noted the large amount of hornstone in the surface exposures of the Corniferous 

 limestone in the vicinity of Le Roy (Geol. N. V., Ft. IV, pp. i66, 167, see especially the section along 

 Allen creek below Le Roy). 



