CONTENTS 



Lower Silurian system of eastern Montgomery co. 



Introduction 419 



Historical sketch 419 



Calciferous sandrock 419 



Birdseye limestone '. 421 



Black river limestone 423 



Trenton limestone 424 



Utica shale 426 



Hudson river shale 428 



Topography 430 



Stratigraphy 432 



North side of Mohawk 432 



Hoffman ferry fault 449 



South side of Mohawk 457 



Conclusions 464 



Discussion of maps and sections 467 



Stratigraphy of Mohawk valley and Saratoga co. 



Mohawk valley 469 



Sections at Ingham Mills 469 



Schoharie creek section 470 



Bean hill section 471 



Swartstown creek section 472 



Amsterdam section 474 



Patterson ville section 474 



Hoffman fault 475 



Saratoga county 47^ 



Rock City falls section 47^ 



Saratoga Springs sections 477 



Glens Falls sections , 480 



Index 483 



