66 Hershey — Some Western Klamath Stratigraphy. 



tainty, that the Brandon formation is older than the Blue 

 Chert series east of the fault and its superposition proves that 

 it is younger than the similar series west of the fault. 



In the case of the Nordheimer and Bragdon we have two 

 areas of shales practically adjoining, one hadly shattered by a 

 certain system of intrusives and the other entirely free from 

 them. It would seem to be ignoring very strong evidence to 

 fail to consider the Bragdon the younger. 



Within several miles east of the Orleans fault, extending 

 from Patterson's in the valley of New River, to Hall City, 

 there is a succession of limestone outcrops from which Mr. 

 Diller's party and the writer have collected fossils represent- 

 ing a very late Carboniferous or perhaps Permian fauna. 

 Associated with the limestones are shales not very greatly dif- 

 fering from the shales of the Blue Chert series. It is my 

 impression that this late Carboniferous or Permian series is 

 just as thoroughly intruded by igneous material as the Blue 

 Chert and Nordheimer formations ; but I regret that a lack of 

 opportunity to visit the belt during the past few years prevents 

 me from basing this statement on clear mental pictures of 

 igneous rocks cutting the fossiliferous limestone. However, I 

 distinctly remember that the belt containing the late Carbon- 

 iferous or Permian rocks, especially in the New River country, 

 contains more than the usual amount of igneous material, 

 largely in- the form of small batholiths. The Bragdon area, a 

 few miles west, has none of them (serpentine, granite and later 

 intrusives excepted). 



Between the Blue Chert series, which I have decided must 

 be pre-Bragdon, and the late Carboniferous or Permian rocks 

 there is nothing suowstino- the Brag-don formation and no 

 fault or known interval of deposition to account for its absence. 

 However, the country has not yet been so thoroughly explored 

 as to give this argument conclusive value. I am not endeav- 

 oring to settle the question now, but to show that all the known 

 evidence points strongly to the Bragdon formation of the 

 western area being younger than the Blue Chert series, younger 

 than the Nordheimer formation, even younger than the late 

 Carboniferous or Permian limestone'. 



Sept, 30 ; 1905. 



