BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 

 VOL. 4, PP. 205-224, PL. 4 APRIL 14, 1893 



( RETACEOUS AND EARLY TERTIARY OF NORTHERN CALI- 

 FORNIA AND OREGON* 



BY J. S. DILLER 



{Read before the Society December SO, 1803) 



CONTENTS 



Page 



Cretaceous 205 



The Areas and Problems investigated 20o 



Relation of the Chico and Wallala Beds 207 



Relation of the Chico and Horsetown Beds 207 



Relation of the Horsetown and Knoxville Beds 211 



Distribution and Composition of the Shasta-Chico Series 213 



Tertiary 218 



Pre-Cretaceous Elevation of the Klamath Mountains and Sierra Nevada 220 



Inter-Cretaceous-Tertiary Upheaval of the Klamath Mountains 222 



I Ii'sunu' and Conclusions 221} 



Cretaceous. 



The Areas and Problems investigated. — In northwestern California and 

 southwestern Oregon, where the Sierra Nevada, Cascade and Coast ranges 

 meet, there is a plexus of mountains which may for convenience be 

 called the Klamath mountain group. The Klamath mountains extend 

 from the fortieth to near the forty-fourth parallel, and include the Yallo 

 Bally, Bully Choop, South Fork, Trinity, McCloud, Scott and Salmon 

 mountains of California, and the Siskiyou, Rogue river, and perhaps 

 others in Oregon. The outline of the Klamath mountain group is indi- 

 cated on the accompanying map by a heavy broken line. The map 

 (plate 4) contains nearly all the localities mentioned in this paper. 



* Printed by permission of the Director of the U. S. Geological Survey. 



♦This paper is a sequel to a memoir on the geology of the Taylorville region of California, pub- 

 lished in Bull. Geol. Soo. Am., vol. 3, pp. 369-394 Both are accompanied by paleontologic papers ; 

 the first by Professor Hyatt, on the "Jura and Trias at Taylorville, California" (vol. :;. pp. 395-412), 

 and this one by Mr Stanton's brochure "On the Faunas of the Shasta and Chico Formal ions," which 

 immediately follows. 



XXXl-Bur.r,. Geol. Soo. Am., Vol. 4, 1892. (205) 



