Is 5 miles south of Oro Grande. There are a number of claims, the
principal one being the Amazon. The formation is similar to that about
Oro Grande. In a large dike of diorite occur the ore bodies of the
Amazon Mine, which produces copper ores of a fair grade. Several holes
were sunk to various depths, ranging from 15 to 30 feet, by the Mormons
who settled on the Mojave River years ago. Recently a shaft has been
sunk to the depth of 61 feet, and a drift run north 40 feet. The ore is
principally copper-iron sulphide (chalcopyrite).
The ore in this mine occurs along slips or fault planes. This peculiar
class of deposits has been described under the head of the Tiptop Mine,
Lava Beds District, in this county, and as the essential features of
this mine are similar to those of the Tiptop, repetition here will be
unnecessary. I found a greater mineralization of the limestone in this
district than about the Oro Grande, though no prospecting has been done
here for lead ores.