

Education Department Bulletin 



Published fortnightly by the University of the State of New York 



Entered as second-class matter June 24, 1908, at the Post Office at Albany. R. Y., tinder 



the act of July 16, 1894 



No. 525 



ALBANY, N. Y. 



August 15, 1912 



New York State Museum 



John M. Clarke, Director 



Museum Bulletin 162 



THE LOWER SILURIC SHALES 



OF THE 



MOHAWK VALLEY 



BY 



RUDOLF RUEDEMANN 



PAGE 



Introduction 5 



Historical sketch 7 



*' Utica " shale of authors. . . •. 15 



Frankfort shale 34 



Schenectady formation 37 



Indian Ladder beds 50 



PAGE 



Summary 66 



Bibliography 69 



Paleontological notes 73 



Explanation of plates 125 



Index 145 



APR161911 



ALBANY 



UNIVERSITY OF THE STATE OF NEW YORK 

 I912 



Mi6r-My 12-1500 



