74 ROCHESTER ACADEMY OF SCIENCE. [Jan. II, 



NO. OF DESCRIPTION OF 



SAMPLE. DEPTH. SAMPLE. 



11. 550'. Mainly a blackish, argillaceous shale with 



brownish streak. This is hardly typical 

 Genesee shale ; but if not Genesee is 

 similar to a recurring black shale which has 

 been described by Professor Williams and 

 others from surface outcrops. (') Genesee (?). 



12. 6co'. Ditto. 



13. 650'. Ditto. Genesee. 



14. 700'. Dark gray to bluish, argillaceous slightly 



arenaceous shale. Streak white, non-cal- 

 careous. 



15. 750'. Gray argillaceous shale, Onechip contains 



two small Lamellibranchs, one of which 

 resembles a young shell of Nucula 

 bellistriata (Con.) Hall ; and one specimen 

 of Styliola fissurella Hall. 



Lithology same as No. 15. 



Darker gray, argillaceous shale. 



Dark gray shale, part of it finely arenaceous. 

 Some of the chips have a slightly brownish 

 streak, slightly calcareous, with " a flow 

 of gas." 



19. 950'. Light gray, argillaceous shale, streak white, 



quite calcareous. A dorsal valve of a 

 Discina, which may be compared with 

 D. doria Hall, and a fragment of another 

 shell. 



20. 1000'. Shale, ditto, "(ias sufficient for 5 or 6 



lights, or for 2 stoves. The volume was 

 greater and the flow steadier than in any 

 other well we have had [in the Warsaw 

 region]" Mr. S. T. Kerr. 



(I.) Bull. Geol. Surv., No. 41, pp. 23-25, 31-34. 4'. 47-50- 



Prof. Hall, in 1879, called attention to this fact in central and western New York and said this 

 black slate [Genesee] is succeeded by a green or olive slate or shale, followed by successive alterna- 

 tions of black or greenish shales " (tleol. Surv., N. Y. Paheontology, vol. v, pt. II, pp. 150, 151). 



Then Dr. Clarke, in 1885, described a " Lower and Upper Black Band " in the Naples Shales of 

 Ontario Co., of which he said : " Further west they lose their persistency and become a series of thin 

 beds alternating with the greenish shales and flag-stones" (Bull. U. S. Geol. Surv., No. 16, pp. 



36, n)- 



