Beede — The Guadalupian and Kansas Sections. 131 



Art. X. — The Correlation of the Guadalupian and the 

 Kansas Sections* ; by J. W. BEEDE.f 



Introduction. — The appearance of the "Guadalupian Fauna";}: 

 again brought into prominence the question concerning the age 

 of the rocks of Kansas and Oklahoma that have usually been 

 referred to the lower Permian. The writer thought it quite 

 necessary to make a trip to the Guadalupe region last season in 

 order to determine anew the stratigraphic relationship and, if 

 possible, to determine the paleontologic interrelations of the 

 red beds and the Guadalupian limestones. These red beds are 

 common to the Texas and Kansas regions, and their age and 

 relationships are known. If the relative position of these beds 

 to the Guadalupian deposits could be established, then the cor- 

 relation of the deposits with those of Kansas could readily be 

 made. The outcrop of the Guadalupian strata w^ere therefore 

 studied during the summer of 1909, and with the assistance of 

 Mr. Hal P. Bybee during the earlier part of the season. 



Stratigraphy. 



Our visit to the region last summer was for the purpose 

 of reviewing the stratigraphic relationship and determining 

 whether the Pecos valley red beds actually occupied a higher 

 position than the Guadalupian limestones and, if possible, to 

 secure fossils from them which would demonstrate their age. 

 Only the general itinerary and more important observations 

 will be mentioned here. 



After a brief survey of the region lying east of the Davis 

 mountains, from Phantom Lake to Kent, and San Martine, 

 Texas, we traveled west and north from Toy ah over the Creta- 

 ceous red beds, and along the eastern outcrop of the Delaware 

 mountain formation to Guadalupe Point. Here the upper part 

 of the type section of the Guadalupian series was studied and 

 collections made. Then at Carlsbad, New Mexico, the Pecos 

 valley red beds with the subjacent limestones and sandstone 

 were seen, with broad, low anticlines of the upper Guadalupian 

 limestone protruding through them. Farther west the gypsum 

 deposits of the red beds appeared in the synclines and on the 

 sides of the anticlines. East of Queen the upper-Guadalupian 

 limestones rise from beneath the gypsum beds and form the 

 mass of the Guadalupe mountains of this region, some thirty 

 miles north of Guadalupe Point. A trip south through the 



* Eead before the Paleontological Society of America, Dec, 1909. 

 \ By perraission of the State Geologist of Kansas. 



X Girty, U. S. Geol. Sitrv., Prof. Paper 58, 1908 [1909]. See also Rich- 

 ardson's paper in this Journal, April, 1910, pp. 325-337. 



