﻿NO. 7 



SMITHSONIAN EXPLORATIONS, I926 



53 



The region surrounding the city of Chihuahua is a rich one. 

 Sixteen miles away is the famous camp of Santa EulaHa, where since 

 1 59 1 the mines have been in almost constant operation. The ore bodies 

 are quite extensive, carrying silver, lead, and zinc, and occurring in 



Fig. 56.— Large crystals of gypsum in a cave in tlie Maravilla 

 Mine at Naica, Chihuahua. (Photograph by Foshag.) 



" mantos," one ore body having been followed for over two miles. 

 Some of the chambers left by the removal of the ore are enormous, 

 one in the Potosi Mine being 600 feet high, 300 feet long, and 200 

 feet wide. Other nearby localities visited were the La Ceja district, 

 producing lead and zinc; Placer de Guadalupe, a small camp well 

 known for its gold placers and for the combination of gold and pitch- 



