beede: upper permian red beds. 137 



There are a few changes in the classification used in this 

 paper from the preceding ones. In the present classification 

 it is seen that the gypsum beds and the groups of gypsum 

 beds, which form the salient topographic features of the 

 country, play an important part. They are separated by 

 successions of sandstones and shales and dolomites. It will 

 be seen from the above cut that Gould has replaced the term 

 "Norman" with "Enid," limiting it thus: "The Enid for- 

 mation includes all the rocks of the Red Beds from the base 

 of the Permian to the lowermost of the gypsum ledges on the 

 eastern slope of the Gypsum Hills. The top of this forma- 

 tion, however, is not a plane, since the gypsum beds which 

 mark its topmost limits are found to be more or less lenticu- 

 lar when traced for long distances. The Enid comprises all 

 of the Harper, Salt Plains and Cedar Hills members of 

 Cragin's first paper, and the Kingfisher and Glass Mountain 

 formations of his second paper. It is named from the county- 

 seat of Garfield county." 



It will be seen that the Enid differs from the Norman as 

 previously defined in excluding the rocks referred to the Red 

 Beds which are the equivalents of the Pennsylvanian rocks 

 below the Permian ; hence, probably, the reason for substitut- 

 ing the second term. The general section gives an adequate 

 idea of the stratigraphic succession and the groupings. The 

 invertebrate fossils mentioned in this paper were taken from 

 the Whitehorse sandstone and the upper part of the Quarter- 

 master division. 



In the "Geology and Water Resources of the Eastern Pan- 

 handle of Texas," Gould carries the mapping west to the foot 

 of the Staked Plains and discovers the Dockum beds lying 

 unconformably upon the top of the Quartermaster formation,'^ 

 but pinching out to the north and not extending into Kansas. 

 Neither are they represented in Oklahoma. 



The Dockum beds may extend, in local patches beneath 

 the later rocks, into southwestern Kansas, but are not ex- 

 posed at the surface. 



Perhaps the first article to appear on the vertebrate paleon- 

 tology of Oklahoma was by Williston, entitled "Notes on the 



39. U. 8. Water-snpp. and Irr. Pap., 154, 1906. 



