644 NORTH AMERICAN INDEX FOSSILS. 



Numerous subdivisions have been made many of these being of 

 only local extent. In the following, the divisions of the Carbonic, 

 are those recently published by Beede and Rogers,^^ who moreover 

 slightly rearrange the classification into stages. The divisions of 

 the Permic are according to Prosser^*' and Cragin.^^ 



The CiMARRON^^ is divided into the Kiger (including the Taloga 

 formation, Day Creek dolomite, and Red Bluff formation) and the 

 Salt Fork (including the Dog Creek beds [Chapman and Amphi- 

 theatre dolomite] the Cave Creek Gypsum [Shimer Gypsum, 

 Jenkins clay and Medicine Lodge Gypsum], the Glass Mountain 

 beds [Flower pot shales. Cedar Hills sandstone] and the Kingfisher 

 formation [Salt Plain, and Harper beds]). 



The Sumner is divided into the Wellington shales, and the 

 Marion formation, the latter including : Upper variegated clays and 

 marls with some limestones, Abilene conglomerate, Pearl shales, 

 Herington limestone, Enterprise shales and Luta limestones. The 

 Chase is divided into the Winfield limestone, Doyle shales, Fort 

 Riley limestones, Florence Flint, Mat field shales and Wreford 

 limestone. The base of the Kansas Permic was provisionally 

 placed here by Prosser in 1902, but further studies especially by 

 Beede and Prosser have brought out faunal evidence which indi- 

 cate that the base of the Permo-Carbonic is as low as the base of 

 the Elmdale formation. 



The coal measure series of Kansas below the Chase has recently 

 been divided by Beede and Rogers into four series, and ten stages. 

 In descending order Series IV. comprises Stage J (Council Grove 

 stage of Prosser), which includes the Neosho formation, the 

 Florena shales (these two together constituting the Garrison for- 

 mation) and the Cottonwood limestone; and Stage I which in- 

 cludes: Eskridge shales, Neva limestone and Elmdale formation. 

 This is now regarded as the base of the Permo-Carbonic. Series 

 III. comprises Stage H, which includes the Americus limestone, 

 Admire shales, Emporia limestone, Willard shales, Burlingame 

 limestone and Scranton shales; Stage G including: Howard lime- 

 stone, Severy shales, Topeka limestone, Calhoun shales, Deer Creek 



^^ Kansas University Geol. Surv., IX., p. 2>3^' 



^^ Journal of Geology, Vol. X., p. 703, and chart opposite p. 718. 



^American Geologist, XIX., pp. ZS'^-Z^Z' 



^ All divisions are given in descending order. 



