Published monthly by the 



New York State Education Department 



BULLETIN 413 



SEPTEMBER 



New York State Museum 



John M. Clarke, Director 



Bulletin 115 

 GEOLOGY 14 



GEOLOGY OF THE LONG LAKE 

 QUADRANGLE 



H. P. CUSHING 



PAGE 



Acknowledgment 451 



Situation and character 451 



General geology 453 



Rocks 459 



Rock structures 484 



PAGE 



Topography 490 



Glaciation 495 



Economic geology 502 



Petrography of the rocks 503 



Index 529 



