BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 

 VOL. 4, PP. 257-298, PLS. 5-9 JUNE 19, 1893 



TWO NEOCENE RIVERS OF CALIFORNIA 



BY WALDEMAR LINDGREN 



(Presented before Ihc Society December SO, 1892) 

 CONTENTS 



Page 



Introduction 258 



Review of Literature 25! » 



< )l (servations on Method of "Work 262 



( Outlines of Geologic History 263 



Topography 263 



Condition of the Sierra Nevada before and during the Gravel Period. 264 



The volcanic Period 266 



The Neocene Yuba River 268 



The main River 268 



From the Sacramento Valley to French Corral 268 



The Nevada City and Grass Valley Channels 269 



French Corral to North San Juan 270 



North San Juan to Badger Hill 270 



The North Fork ] 271 



The Middle Fork 271 



Badger Hill to North Bloomfield 271 



North Bloomfield to Snow Point 272 



The Derbec Channel 27:; 



The Forest City Channel 27:; 



Snow Point to Milton 271 



Milton to Meadow Lake 276 



The South Fork 277 



Badger Hill to Dutch Flat 277 



The Channel at Dutch Flat 282 



The Liberty Hill Tributary ' 282 



The Channel between Alta and Shady Run 283 



The Neocene American Liver 284 



The South Fork 284 



From the Sacramento Valley to Diamond Springs 284 



Diamond Springs to Newtown 285 



Newtown to Pacific House 286 



The North Fork 287 



From the Junction to Jones Hill 287 



Jones Hill to Bath 288 



The Iowa Hill Channel 289 



X XXIX— Bull. Gkol. Sue. Am., Vol. 1, 1892. (-57) 



