BEEDE: UPPER PERMIAN RED BEDS. 133 



Ge logical. Society of America, concerning preliminary studies 

 in Texas ^* on the relationship of the Red Beds to the lime- 

 stones and shales to the southward. He states his reconnais- 

 sance work confirms the detailed work of Cummins in showing 

 the Albany and Wichita beds to be different facies of the 

 same horizon as quoted above. On page 198 of the last ref- 

 erence cited, under the caption "obsolete terms," Adams 

 states: "Concerning the terms Wichita, Clear Fork, and 

 Double Mountain, it may be said that there is little reason 

 to believe that they should be any longer retained, since they 

 have no stratigraphic significance." The retention of these 

 terms is a necessity until, by further work, it can be shown 

 that a better general classification is available. Had any de- 

 tailed work been done showing the necessity of any changes 

 in formation names, or showing any inaccuracy in the later 

 detailed work of Cummins, the situation would be very dif- 

 ferent. 



Four publications have added an inestimable amount to 

 our knowledge of the geology of Oklahoma and the Panhandle 

 of Texas. The first of these is the Second Biennial Report of 

 the Department of Geology and Natural History of the Terri- 

 tory of Oklahoma. In it are two articles bearing on the 

 subject under consideration. The first of these is the "Gen- 

 eral Geology of Oklahoma," by Gould. '^^^ In this paper he 

 gives a brief review of previous literature and then describes 

 in fair detail the geology of the territory. He discusses the 

 manner in which the lighter deposits to the north dissipate 

 into red deposits of the territory, agreeing with Adams that 

 the eastern extremity of these beds are Pennsylvanian. He 

 then gives the classification of Cragin, and shows how it is 

 necessary to revise it on account of conditions found in Okla- 

 homa which are not exhibited in the northern extremity of 

 the formations in Kansas. His section is given below. He 

 gives Cragin's classification and his own modified to meet 



34. Sci., XV, pp. 545, 546; XVI, p. 1029, 1902. Bnll. Geol. Soc. Amer, XIV, pp. 191-200, 19(3. 



35. Pages 17-74, 1902. 



