BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Vol. 7, pp. 327-348, PL. 15 MaRCH 12, 1896 



PREGLACIAL AND POSTGLACIAL VALLEYS OF THE 

 CUYAHOGA AND ROCKY RIVERS 



BY WARREN UPHAM 



{Read before the Society by title December 28, 1895) 

 CONTENTS 



Page 



The Cuj^ahoga valley 327 



Extent of the drainage basin 327 



Preglacial width and depth 328 



Partial filling with glacial drift 328 



Delta of modified drift and allavium 330 



Postglacial erosion 332 



Valleys of the Rocky river 332 



Relation and character of the two valleys 332 



Size and course of the preglacial valley 333 



Complete filling of the preglacial valley with drift 333 



The postglacial Rock}'- river valley 334 



Drift sections , 334 



Lake Erie cliff crossing the preglacial Rocky river valley 334 



East side of the Cuyahoga valley on Clark avenue 33() 



South-to-north section in the west part of Cleveland 338 



From Newburg northwest to lake Erie 338 



Altitudes in Cleveland from the city surveys 339 



Beach ridges in Cleveland 340 



Relation of the beaches 340 



Leipsic beach of the Western Erie glacial lake 340 



Belmore or Sheridan beach of lake Warren. .' . . . 341 



Lower beaches of lake Warren 343 



Third or Woodland Avenue beach 343 



Fourth or Euclid Avenue beach 343 



Correlation with stages of the glacial recession 344 



Temporary re-advances of the ice-sheet 345 



At the mouth of Rocky river and in Cleveland 345 



At Toronto and Scarboro' , Ontario 345 



Climatic conditions of the Champlain epoch 346 



The Cuyahoga Valley. 



extent of the drainage basin. 



The highest springs of the Cuyahoga drainage basin are in northeastern 

 Geauga county, in northeastern Ohio, about fifteen miles south of the 



XXXVII— BuLi,. Geol. Soc. Am., Vol. 7, 1895. (327) 



