and the Kansas Sections. 135 



trating tlie similarity the following section taken at Kiowa 

 peak, Stonewall County, Texas,* is given : 



1 . Gypsum and clay 60 ft. 



2. Red clay 20 " 



3. Gypsum. .* - 20 " 



4. Red clay 35 " 



5. Gypsum -..- 15 " 



6. Gypsum, alabaster 4 " 



Total 154 « 



In tliis section the more minute details are omitted, and some 

 thin limestones containing fossils are not given. It is doubtful 

 if the whole thickness of the gypsum-bearing beds is seen since 

 at the exposure the top of the hill is capped with massive 

 gypsum. However, the succession of gypsum lentils, red clay 

 and red sandstone is similar to that of tlie west side of the 

 Pecos valley, as shown in Fisher's sections. Along much of 

 their outcrop through the Panhandle, Oklahoma, and south- 

 ward, the Greer formation, or the gypsiferous beds of the 

 upper red beds, are overlain by a rather extensive layer of 

 dolomite. It is found at Dozier, Texas, southwestern Okla- 

 homa, and at Quanah, Texas. There is a similar covering of 

 dolomite in many places in the western Pocos valley region. 



Paleontology. 



Since the stratigraphic evidence regarding the identity of the 

 Pecos valley and the upper red beds east of the Staked Plains 

 is so complete, it now remains to examine the meager paleon- 

 tologic data at hand. 



The farina of the Whitehorse and Quartermaster beds has 

 been described and its character noted. f The most common 

 fossils of these beds are the pelecypods referred to the genus 

 Cyrtodontarca. Indeed, scarcely a fragment of the fossilifer- 

 ous stone can be picked up in which they are not abundant 

 (I refer to the larger forms). These fossils are not so plentiful 

 in any other horizon in this country so far as I am aware, and 

 they may be considered the characteristic fossils of these beds. 

 The Whitehorse and Quartermaster beds contain nearly forty 

 species of fossils. The dolqmites between these beds contain 

 abundant Schizod^ts and Pleurophorus sliells. 



The fossils of the Pecos valley region are very rare so far as 

 our present knowledge goes. Fisher found some in the lime- 



* Cummins, Geology of N. W. Tex., Geol. Surv. Tex , Sec. Ann. Rep., 

 p. 407, 1891. 



f Beede, Invei-tebrate Paleontology of the Upper Permian Eed Beds of 

 Oklahoma and Panhandle of Texas, Kans. Univ. Sci., Bull, iv, pp. 115-168, 

 1907. 



