52 THE PERMO-CARBONIFEROUS RED BEDS OF 



the Clear Fork,'' but no vertebrate fossils have been found in either one. 

 Unfortunately we have no record of just what becomes of the Greer and the 

 Woodward to the southeast. Gould's map ceases before the end of the forma- 

 tions is reached. But we know that the Wreford limestone has been traced 

 south to the western side of the Arbuckle Mountains as the Payne sand- 

 stone,'' and that the Cisco begins in Texas just east of Henrietta, and that 

 both of these shade into red beds on the west. The question rises whether 

 the Enid is to be regarded as a continuation of the Wichita and Clear Fork 

 as represented by the Red Beds around the Wichita Mountains, or whether 

 it is possible that the 800 feet," more or less, of the Greer and Woodward, 

 is to be regarded as completely dividing the two formations, instead of ex- 

 tending over them as an embaynient from the northwest. Fossils from the 

 Enid have not been found south of Mulhall, in Logan County, and this 

 leaves quite a distance between the areas whose age has been determined, 

 but, as shown below (see table, p. 96), the vertebrate fossils from Orlando, 

 Pond Creek, and McCann's Quarry are very similar to, or identical with, 

 those from the Texas localities. 



Descriptions of the Enid and Woodward have been given by Gould, "^ 

 and are as follows: 



"The Enid formation includes all the rocks of the Red Beds from the base of 

 the Permian to the lowermost of the g;y'psum ledges on the eastern slope of the g\'p- 

 sum hills. The top of this formation, however, is not a plane, since the g}'psum beds, 

 which mark its uppermost limits, are found to be more or less lenticular when traced 

 for long distances. The Enid comprises all of the Harper, Salt Plain, and Cedar 

 Hills members, and the greater part of the Flowerpot member 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. 



' ' The Enid outcrops over a larger area than any other formation of the Permian 

 in the Oklahoma, and is exposed extensively in adjoining States. In Kansas it out- 

 crops over parts of Sumner, Kingman, Reno, Barber, and Comanche Counties, and 

 all of Harper County. In Oklahoma it is found in the western parts of Kay, Noble, 

 Payne, Logan, Oklahoma, and Cleveland, parts of Woods, Woodward, Blaine, and 

 Canadian, and all of Kingfisher, Garfield, and Grant Covmties. It also extends into 

 the Chickasaw Nation. 



"The Enid formation consists chiefly of brick-red clay shales, with some inter- 

 bedded ledges of red and whitish sandstone. It occurs in two general areas, which 

 may be distinguished on lithological grounds as follows : An eastern area, in which 

 there are a few inconspicuous ledges of sandstone, and a western area, in which 

 the sandstones are mostly wanting. In the present state of knowledge, it is impos- 

 sible to draw an accurate line of separation between these two areas, and for this 

 reason the strata in them are not defined as separate members. 



» Schuchert, Paleogeography of North America, p. 558; Gould, U. S. Geological Survey, Water Supply 

 and Irrigation Paper No. 155, p. 17. 



'' Kirk, Third Biennial Report State Geologist Oklahoma, 1904; Gould, Ohern, and Hutchinson, State 

 University Oklahoma Research Bull. No. 3, map. 



• Gould, U. S. Geological Survey, Water Supply and Irrigation Paper No. 148, p. 40. 



■^ Gould, Ibid., pp. 39-52. 



