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, N. Y., under 



the act of July 16, 1894 



No. 463 



ALBANY, N. Y. 



January 15, 1910 



New York State Museum 



John M. Clarke, Director 

 Museum bulletin 135 



GEOLOGY OF THE PORT LEYDEN 

 QUADRANGLE, LEWIS COUNTY, N. Y. 



BY 



W. J. MILLER 



PAGE 



Introduction 5 



General geologic features 6 



Topography and drainage 8 



Precambric rocks 9 



Paleozoic rocks 21 



Structural geology 34 



PAGE 



Paleozoic overlap ^il 



Surface of the Precambric rocks.. 39 



Pleistocene (glacial) geology.... 44 



Ice erosion 46 



Economic products 56 



Index 59 



