beede: upper perm i an red beds, 131 



subject, with the result that the age of the Kansas and Okla- 

 homa beds is pretty well understood. Cragin, Gould, Adams 

 and Kirk are the ones to whom we are principally indebted 

 for the field-work, and Williston and Case for the determina- 

 tion of the vertebrates. My knowledge of the stratigraphy 

 of the Red Beds of Oklahoma is too limited to enter into a 

 detailed discussion of the merits and value and synonoray of 

 the various formational names proposed for the horizons of 

 Kansas and Oklahoma, and I will content myself with keep- 

 ing track of the larger divisions only, which, in the main, 

 concern us here. 



In 1897 Prof. F. W. Cragin published an article entitled 

 "Observations on the Cimarron Series, "^^ in which he gives 

 the results of a trip across the territory of Oklahoma. In 

 this paper he shows that the horizon of the large gypsum 

 beds extends into southern Oklahoma and Texas. Cragin 

 here refers all the Kansas Red Beds to the Permian, on 

 stratigraphic evidence, which, however, is much stronger 

 than that upon which most of the previous opinions concern- 

 ing the age of these beds was based. The bulk of the paper 

 is concerned in the minutiae of the stratigraphy of these beds 

 and a revision of their classification. 



In 1898 Adams made a trip into Oklahoma from southern 

 Kansas, and gives a brief description of the trip and its re- 

 sults in an article in the Kansas University Quarterly}^ He 

 describes the appearance and features of the Red Beds in 

 three counties, including the Glass mountains. He gives a 

 reconnaissance map of the region. 



Gould published a statement showing the change of the 

 Wellington shales into red strata, near Vardin, Okla.^^ 



In 1900 Gould, with two other members of the Oklahoma 

 survey, made an extended trip into the northeastern part of 

 the territory,^" for the purpose of determining the nature of 

 the Upper Pennsylvauian and Lower Permian of that region. 

 In the article mentioned he shows how the limestones and 



27. Amer. Geol., XIX, pp. 351-363, 1^97. 



28. A Geological Reconnaissance in Grant, Garfield and Woods Counties, Oklahoma. 

 Kan. Univ. Qaart,, VII, pp. 121-124, 1898. 



29. Kan. Univ. Quart., 1900, pp. 175-177. 



30. Notes on the Geology of Parts of the Seminole, Creek, Cherokee and Osage Nations. 

 Amer. Jour. Sci., XI, pp. 185-190, 1901. 



