STRATIGRAPHIC SUMMARY. 653 



Texas, together with the Goodland limestone, represents what re- 

 mains of the Fredericksburg. 



The Washita of northern Texas includes, in descending order, 

 the Grayson shale, Main St. limestone, Pawpazv and Weno beds, 

 Denton beds, Fort Worth limestone. Duck Creek beds and Kiamitia 

 shales. In Oklahoma, the series comprises the Bennington lime- 

 stone, Bokchito shale, Caddo limestone and Kiamitia shales. In 

 Kansas, the Kiamitia alone is represented by the Kiowa shale and 

 Cheyenne sandstone. In all the sections, the Dakota (Woodbine 

 or Silo) sandstone terminates the sections. In the Austin, Texas, 

 region the members are more calcareous and comprise in descending 

 order beneath the Eagle Ford : Buda limestone, Del Rio clays and 

 Georgetown limestone. 



On the Pacific coast, the Comanchic series is comprised in the 

 Shasta group, separable into the upper or Horsetown and the lower 

 or Knoxville series. In the Queen Charlotte Island, the series is 

 represented by the Queen Charlotte formation. East of the Cana- 

 dian Rockies the Kootenay non-marine series represents the greater 

 part of this system. 



In Alaska, Comanchic strata are well developed, being repre- 

 sented by the Kennicott formation of Prince William Sound and 

 the Copper River region; and the Anaktuvuk series and the Koyu- 

 kuk series of northern Alaska. 



On the Atlantic coast the Patapsco and Raritan in the northern 

 sections, and the Tuscaloosa in the southern sections represent 

 this system. 



In Arizona, the Bisbee group nearly 4,500 ft. thick, represents 

 the Comanchic. It is divided in descending order into: Centura 

 formation (shales, sandstones and limestones) ; Mural limestone; 

 Morita formation (sandstones, shales and limestones) ; and Glance 

 conglomerate. This rests unconformably upon the Naco limestone 

 of Carbonic age. 



Finally in Mexico the Tehuacan limestone represents basal 

 Comanchic. 



XL The Cretacic System. 



The general subdivision of the American Cretacic, as developed 

 in the interior, is as follows : 



