132 KANSAS UNIVERSITY SCIENCE BULLETIN. 



shales of the top of the Pennsylvaniaa and the Wreford 

 limestone and associated formations finally give place to red- 

 dish sandstones and shales similar to those of the Red Beds 

 above, just as Cummins had shown them to do in Texas on 

 passing northward. He sums up the results of the trip as 

 follows: "1. The Flint Hills do not extend as far south as 

 the Seminole country. 2. The sandstone which is well de- 

 veloped in the eastern part of Chautauqua county, Kansas, 

 continues uninterruptedly southward east of the Flint Hills, 

 beyond the North Canadian river. 3. The eastern limit of 

 the Red Beds in southern Oklahoma is not far from the west- 

 ern part of the Seminole country. . . ." 



Adams made a trip in this region and east of it, coming to 

 much the same conclusion as Gould, but giving a map illus- 

 trating the change in color and lithology of the formations. ^^ 

 In this paper Adams states that the sections of Gould and 

 Drake were taken as cross-sections of the rocks and did not 

 permit of accurate correlation. While some of Gould's sec- 

 tions were taken at points where the correlation was uncer- 

 tain, yet this criticism probably was not intended to apply to 

 Gould's paper as a whole, for the stratigraphy of the north- 

 ern region bears the evidence of being correct, and the hori- 

 zons of the upper part properly correlated, and, furthermore, 

 it corresponds with Adams's correlations as shown on his map. 



In another place^- Gould describes how the Marion and 

 Wellington formations change from light-colored calcareous 

 and argillaceous beds to more arenaceous red sediments like 

 the overlying Red Beds. These accounts of his give us a 

 very fair idea of the lithologic changes taking place in the 

 southern extension of the Kansas Lower Permian. He de- 

 scribes the passage of the Gypsum Hills from Kansas into 

 Texas, the result of his work on the Oklahoma survey in the 

 same year,^^ showing that the upper Red Beds are the same 

 in the three states. 



Adams published articles in Science and the Bulletin of the 



31. Carboniferous and Permian Age of the Red Beds. Amer. Jour. 8ci., XII, pp. 383-386, 

 1901. 



32. On the Southern Extension of the Marion and Wellington Formations. Trans. Kan. 

 Acad. Sci., XVII, pp. 179-181, 1901. 



33. Amer. Geol., XXVII, pp. 188-190, 1901. 



