Published monthly by the 

 New York State Education Department 



BULLETIN 362 DECEMBER 1905 



New York State Museum 



John M. Clarke, Director 



Bulletin 96 

 GEOLOGY 10 



GEOLOGY 



OF THE 



PARADOX LAKE QUADRANGLE, NEW YORK 



BY 



IDA H. OGILVIE 



PAGE 



Introduction 461 



Topography and geology of the 



Adirondack^ 461 



Recent geologic work 463 



Location and topography of the 



Paradox Lake quadrangle. . 464 



Physiography and glaciology. . . 465 



Cambric drainage lines 465 



Peneplains 468 



Summary of the preglacial ero- 

 sion history 468 



Age of lower base-level 469 



PAGE 



Glacial deposits and drainage 



modifications 469 



General geology 478 



Summary of evidence of rel- 

 ative age of igneous rocks 487 



Petrography 492 



Petrography of sedimentary 



rocks 493 



Petrography of igneous rocks. 495 

 Summary and conclusions.. . . 502 



Economic geology 503 



Index 507 



