Diller — Klamath Mountain Section, California. 355 



It should be stated that in the supposed Cretaceous area on 

 Post Creek near its junction with Rattlesnake some imperfect 

 plant remnants were found last summer, concerning which 

 Mr. Knowlton reports : " The best preserved specimen is a por- 

 tion of a leaf apparently identical with that Fontaine has 

 identified as Angiopteridium strictinerve latifolium in a forth- 

 coming paper with Professor Ward on the flora of the Shasta 

 group. This material would seem to be Cretaceous and to be 

 similar in age to the Shasta." 



The outliers at the southern end, as pointed out by Hershey, 

 are aligned approximately northeast and southwest parallel to 

 the Bully Choop Divide and the Cretaceous at its eastern base. 

 The strike of the beds in the largest isolated area of Cretace- 

 ous, that of the Redding Creek basin, ranges generally between 

 N. 55° to 71° E. and dips to the southeastward, indicating a 

 line of deformation nearly perpendicular to that which deter- 

 mined the surface distribution of the rocks older than the 

 Triassic. 



Towards the northern end of the Klamath Mountains on the 

 head of the Middle Fork of Smith River, and on the Illinois 

 River near Waldo and Kerby, a mass of fossiliferous sand- 

 stones, conglomerates and shales occur resting with marked 

 unconformity upon older rocks. Among the fossils, a number 

 of which were new species, Pecten operculiformis and several 

 other forms were determined. Concerning the collection as 

 a whole Dr. Stanton reports : " There is a lack of well known 

 characteristic species but the collection is probably from the 

 Horsetown." The basal conglomerate near Waldo is com- 

 posed almost wholly of sandstone fragments and not of perido- 

 tite or serpentine which are so abundant in that neighbor- 

 hood, suggesting that as in other localities further to the north- 

 west the peridotite was erupted after the Horsetown beds were 

 deposited. 



The greatest extent of this area is approximately northeast 

 and southwest along the road from Waldo much of the way to 

 Grant's Pass, and continuing in the same direction beyond 

 Rogue River less than a score of miles over other rocks, brings 

 one to the Graves Creek locality of Cretaceous sandstone and 

 conglomerate so rich in fossils. The distribution of these two 

 areas suggests that they occupy depressions in the same trough, 

 which is in general parallel to a closely related line, of out- 

 cropping Cretaceous extending from the vicinity of Riddles 

 southwest across Rogue River to the coast near the mouth of 

 Pistol River. 



The general distribution of the Knoxville, Horsetown and 

 Chico beds in the Klamath Mountain region is such as to con- 

 firm the conclusion long since drawn, that the Cretaceous 



