212 GUIDEBOOK OF THE WESTERN UNITED STATES 
From Globe busses convey passengers over the Phoenix highway, 
generally known as the Apache Trail. The first conspicuous feature 
is a ridge of gravel (old valley fill), which is crossed just south of the 
Old Dominion mine. The road passes about 2 miles east of the great 
Sw. NE. 
Apache Mtn. 
FIGURE 53.—Section of region near Globe, Ariz. By Ransome and Darton 
copper camp of Miami, where copper is extracted by acid leaching 
from altered schists and other rocks that carry the metal in small 
percentage. Great piles of tailings of pulverized rock are a con- 
spicuous feature. According.to the United States Bureau of Mines, 
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Tornado and Martin Apache group Granite Pinal schist Faults 
peaetones ° 1 5Miles 
FIGURE 54.—Outline geologic map of Globe-Miami mining region, Ariz. By F. L. Ransome 
in 1929 this camp produced 166,357,360 pounds of copper from 
ae ,067 tons of ore in which the copper content ranged from 0.83 
ee ee sca The ore here is predominantly chalcocite; that at 
the Old De tinion mine in Globe contains also chalcopyrite, bornite, 
