558 C. R. KEYES PROFILES AND STRUCTURES IN DESERT RANGES 



Near the north end of the same range, Caballos Peak, which rises 4,000 

 feet above the plains, shows the following structure (figure 13) : 



Figure 13. — Thrust Plane in Caballos Peak 



On the Chupadera Mesa, in the eastern part of Socorro County, New 

 Mexico, the Carbonic limestones, for a distance of 1,000 feet on either 

 side of a huge dike, are upturned and the whole planed off and covered 

 by horizontal Cretacic sandstones (figure 14). 



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1 



Figure 14. — Ancient Tectonics of Chupadera Mesa, New Mexico 



Illustrations of these phenomena might be repeated indefinitely. It suf- 

 fices to say that they all go to show in a conclusive manner that the more 



