18 University of Kansas Geological Survey. 



though as yet there is no paleontological evidence. An article 

 in the Proc. Academy of Natural Science, Philadelphia, 1859, was 

 also published in the Transactions of the American Philosophical 

 Society, 1863 (read 1861) . The latter is accompanied by a map. 

 These articles contain the following points of interest here : Cer- 

 tain beds between No. 5 of the Coal Measures and the Cretaceous 

 are suspected of being of Jurassic or Triassic age, probably Ju- 

 rassic. Reference is made to his previous discoveries of the 

 Cretaceous age of the higher beds. Nos. 1, 2 and 3 are consid- 

 ered the equivalents of the Cretaceous of Nebraska, as found by 

 Mr. Engleman. ( Vide Rep. Sec. War, Dec. 5, 1857, p. 497.) 



1866 — Mudge. The First Annual Report of the Geology of 

 Kansas, by B. F. Mudge, contains the following concerning the 

 Cretaceous : " No unconformability has been observed from the 

 Coal Measures to the Cretaceous. This formation, which is 

 represented rather largely, has not been definitely studied, since 

 it lies beyond the settlements. Chalk is said to be found in it 

 So far as known, it appears to have a resemblance to the Creta- 

 ceous of England." Under his division Triassic, he describes 

 fossil footprints of birds 10 found in the sandstone northwest of 

 Fort Riley. A few miles distant, in what appeared to be the 

 same horizon, he discovered dicotyledonous leaves. He is in- 

 clined to place the deposits in the Lias. 



1866 — Swallow. In his Preliminary Report of the Geological 

 Survey of Kansas, Swallow refers No. 1 of his section, 295 feet 

 of brown ferruginous sandstone, to the Cretaceous, but states 

 that he saw no proofs of its age. Nos. 2 and 3, which are simi- 

 lar in character, he refers to the Triassic (?) . 



1867 — Hay den. xl This article refers to the report by Swallow, 

 and states concerning the beds referred to the Triassic with a 

 question, that they may be Permian, or even Jurassic, so far as 

 any evidence yet obtained goes. He is inclined to think that 

 they belong to the Trias. 



1869 — Hayden. 1 - In speaking of the Cretaceous rocks (p. 13) , 



10. See article on Cretaceous Birds, this volume. 



11. Notes on Kansas Geology, Amer Jour. Sci., 1>67. 



12. Preliminary Kep. U. S. G. S. of the Ters., 1869. 



