INDEX 



The superior figures tell the exact place on the page in ninths; e. g. 

 424' means page 424 beginning in the third ninth of the page, i. e. about 

 one third of the way down. 



Ami, H. M., on thickness of Utica 

 shale, 428^ 



Amsterdam, situation, 419*; strati- 

 graphy, 432«-41». 



Amsterdam section, 474\ 



Bean hill section, 471''-72«. 



Birdseye limestone, 42r-23'; thicli- 

 ness, 421', 433«, 442», 464"; expos- 

 ures, 433», 436*, 437^, 437«, 439', 

 441", 447», 454», 457*, 457», 460*, 

 473', 474', 475^ 476= ; quarries, 433S 

 473'' ; conclusions regarding, 464'. 



Black river limestone, 423^-24^; thick- 

 ness, 424"; exposures, 433", 436*, 

 437», 438^ 440', 441*, 444^ 447», 

 454», 456S 457", 460*, 473^ 473S 

 474', 476^; conclusions regarding, 

 465\ 



Calciferous sandrock, 419^-21"; thick- 

 ness, 420^-21% 445S 464'; expos- 

 'ures, 433», 433«, 434\ 435», 436', 

 437«, 439^-40^ 441', 442S 444«, 453^ 

 456S 459», 460«, 472^ 474S 474', 

 475', 476*; quarries, 440', 479"; 

 chart illustrating distribution of 

 species, 466'. 

 Chuctanunda creek, 433'. 



Conrad, T. A., on Calciferous sand- 

 rock, 420^ on Birdseye limestone, 

 42r; on Utica shale, 426'; on gray 

 sandstones and shales of Salmon 

 river, 428'. 

 Crane's village, 436'. 

 Cumings, E. R., Lower Silurian sys- 

 tem of eastern Montgomery 

 county, 419-68. 



Dana, J. D., on thickness of Utica 

 formation, 427'; on thickness of 

 Hudson river shales, 429*. 



Darton, N. H., on Birdseye lime- 

 stone, 422^ 477^ on Black river 

 limestone, 424'; on Hoffman 

 fault, 475*; on Ingham Mills sec- 

 tion, 469^; measurement of Cal- 

 ciferous and Trenton stages, 462'; 

 on Utica shale, 427*; on Wing 

 quarry, 477". 



Eaton, Amos, on Calciferous sand- 

 rock, 419^-20^; use of term Birds- 

 eye, 421'; on Trenton limestone, 

 424^ 



Emmons, Ebenezer, on fossils in 

 Birdseye limestone, 422'; on Black 

 river limestone, 424'; on Calcifer- 

 ous sandrock, 420^; on thickness 

 of Hudson river shales, 429^; on 

 Lorraine shales, 429'; on Utica 

 shale, 427'; on thickness of Utica 

 shale, 427". 



Evakill, 430^ 



Featherstonhaugli lake, 431^ 

 Finch and Pruyn quarry, 480'. 

 aiens Falls section, 480»-82«. 



Hall, James, on Calciferous forma- 

 tion in the Mohawk valley, 420'- 

 21'; on Hudson river group, 429', 

 429^; on Trenton limestone ex- 

 posures, 477'. 



Hoffman fault, 449'-56», 475*-76». 



Hudson river formation, contact 

 with Utica slate, 428'-29', 463»- 

 64', 470«, 472*; topographic fea- 



