35° C S. PROSSER 



Permian, as an intermediate connecting series between the Per- 

 mian and Coal Measures which, if worthy of a distinct name at 

 all from the latter, should be called Permo-Carboniferous, while 

 the beds above they regarded alone as properly the equivalent 

 of the true Permian of Europe. 



The occurrence of a few types that would generally be 

 regarded as Permian, along with numerous well-known Coal 

 Measure species, far below the true Permian, only accords with 

 facts observed in other formations in this country, where certain 

 types evidently made their appearance here long before they are 

 known to have appeared in Europe." 1 In discussing the rocks 

 of Gage county, Nebraska, in the Final Report of 1872, Hayden 

 also described a section on a small branch of the Big Blue River, 

 near Beatrice, about which he wrote as follows : " Beds I, 2, and 

 3 of the above section are undoubtedly of Permian or Permo-Car- 

 boniferous age, though they contain fossils common to both 



Permian and Carboniferous rocks Bed 4 seems to form 



a sort of transition bed between the Permian 2 and Carboniferous 

 [misprint for Cretaceous] formations." 3 



This later study of the rocks of southeastern Nebraska has 

 made it possible for us to determine approximately how far 

 below the base of Meek and Hayden's Kansas Permian the 

 Nebraska City rocks occur, and this is perhaps its most impor- 

 tant result. The line between the Permian and Permo-Carbon- 

 iferous of Meek and Hayden was drawn at the top of No. 1 1 of 

 their " General section of the rocks of [the] Kansas Valley;" 4 

 which, as I have shown, occurs about ninety feet below the top 

 of the Chase formation. 5 Then, if we accept the correlation that 



* Ibid., p. 37. In this paper Hayden referred to notes which Meek had given 

 him, stating that they "form the substance of this article," p. 321. 



2 It is not certain that the true Permian beds, as recognized in Kansas, extend 

 northward into Nebraska, though thin beds may occur in some of the southern 

 counties. _ 



3 Final Rep. U. S. Geol. Surv. Nebraska, etc., p. 28. 



4 Proc. Acad. Nat. Sci. Phil., Vol. XI, 1859, pp. 16 and 20. 

 s Jour. Geol., Vol. Ill, pp. 784, 797, 798. 



