UPPER CRETACEOUS SERIES. 



735 



County are separated, it is difficult to comprehend the succession of the rocks. 

 The fact, too, that the variation of the same beds, in the character of the rock 

 and manner of their deposition over a comparatively small scope of country, 

 adds still more to the difficulty of the problem. The Malone bed, as illus- 

 trated in Malone Mountain and Etholen Knobs, is a striking instance, and if 

 it were not for the more persistent beds on each side of it, its position in the 

 succession of strata could never have been told here. 



The following comprehensive section of the rocks worked in El Paso County 

 to the present is given below, that the succession of the rocks may be ob- 

 served at a view. 



Section of Cretaceous rocks investigated in El Paso County to the present: 



PROGRESS SECTION OF THE CRETACEOUS SYSTEM IN EL PASO COUNTY, AS DEVELOPED BY 

 THE WORK OF THE FIELD SEASON OF 1890. 



Upper Cretaceous. 



Division. 



Bed. 



Horizon. 



Locality. 



O on 



Eagle Ford or 

 Benton Shale. 



Carpenter. 



Shale with Inocerami. 

 Arenaceous flaggy shale. 

 Arenaceous lime. 



Carpenter Spring, east side of Eagle 



Mountain. 

 Eagle Spring. 



Feet. 

 760 



Lower Cross 

 Timber or Da- 

 kota Sand. 



Eagle. 



Upper calcareous sand. 

 Lower yellow clay shale. 



Carpenter Spring, east side of Eagle 

 Mountain. 



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