333 CHARLES NEWTON GOULD 



have contributed to our knowledge of the subject. The most 

 comprehensive articles, however, are by Prosser and Cragin. 

 Professor Cragin, in addition to incidental mention of the Red- 

 beds in numerous papers on the geology of southern Kansas, has 

 written two articles dealing exclusively with these series of rocks. 

 In the first paper, entitled "The Permian Series in Kansas," 1 the 

 Red-beds are classified as Upper Permian, and are included under 

 the Cimarron series, which is divided into two divisions, the Salt 

 Fork and Kiger. Each of these divisions is further subdivided 

 on purely lithological grounds into five formations. Professor 

 Cragin's second paper, "Observations on the Cimarron Series," 2 

 is little more than a revision of the former one. The grouping 

 of formations and sub-formations is slightly changed, and a few 

 new points added. These two papers contain the best descrip- 

 tion of the Red-beds extant. Professor Prosser's paper on "The 

 Cimarron Series, or the Red-Beds," 3 contains the best historical 

 review of the literature of the subject so far published, as well 

 as an excellent description of the Kansas Red-beds. 



The reasons for assigning the Kansas-Oklahoma Red-beds to 

 the Permian were chiefly two, viz., first, these rocks were consid- 

 ered to be of the same age as the Texas Red-beds, which are 

 recognized as Permian ; and, second, the series grades conform- 

 ably upward from rocks of undoubted Permian age. The fact that 

 so far as known not a single fossil has been found in the Kansas 

 Red-beds has always been the great obstacle to the accurate 

 correlation of the series. During the past two years, however, 

 as the result of both private investigation and of the work of the 

 Oklahoma geological survey at least four localities have been 

 discovered in the Oklahoma Red-beds from which fossils have 

 been identified. These localities, with the character of the fossils 

 contained in them, are as follows : 



I. McCann's quarry, five miles southeast of Nardin, Kay 

 county ; vertebrates, invertebrates, and leaves. 



'Colorado College Studies, March 1896, Vol. VI, pp. 1-48. 



2 American Geologist, May 1897, Vol. XIX, No. 5, pp. 351-363. 



3 University Geological. Survey of Kansas, 1897, Vol. II, pp. 75-95. 



