EXCHANGE 



Education Department Bulletin 



^lished fortnightly by the University of the State of New York 



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



CD 



the act of July 16, 1894 



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 5 



PAGE 



Summary 66 



Bibliography 69 



Paleontological notes. * 73 



Explanation of plates 125 



Index.. 145 



ALBANY 



UNIVERSITY OF THE STATE OF NEW YORK 

 1912 



Mi6r-My 12-1500 



