282 



Annals of the Carnegie Museum. 



IX. Newberry's New Mexican Section. 



X. Cope's General Section. 



. XI. The Eastern Colorado Section. 



XII. King's 40th Parallel Section. 



XIII. Powell's Uinta Section. 



XIV. White's Northwest Colorado Section, 



XV. North Interior General Section. 



Geological Formations of Central and -Western Kansas. 

 (Adapted from N. H. Darton, 1905.) 



Name Principal Characteristics. 



Sand Hills Sand mainly in dunes, due to 



wind action. 



Alluvium Sand, loam, and gravel in val- 



Quaternary J leys ; talus on slopes. 



Loess Fine sandy loam, of pale 



brownish buff color. 

 Eqtiiis beds Sands and sandy clays. 



Pliocene 



Ogallala formation 



Comprising Tertiary Calcareous grit, sandy clay, 



and sand. 

 Grit, mortar beds, etc. 



Upper 



Cretaceous 



Pierre Shale Dark gray shale or clay. 



Niobrara Formation Chalk, soft limestone, and 



shales. 



Benton Group .-...Shales, limestones, and sand- 

 stones. 

 . Dakota Sandstone Sandstone and shale. 



Lower 



Cretaceous 



Carboniferous 



Kiowa-Cheyenne 



(Later Comanche) Series. ... Sandstone and shales. 



Cimarron Series Red sandstone and shales. 



(Permian) 



Permian Shales and limestones. 



Cottonwood limestones Limestone. 



Waubaunsee group Limestones, shales, sand- 

 stones, and thin coal-beds. 



