HoimvKLL 1 ORE DEPOSITS OF BINGHAM, UTAH. 109 
During 1900 the total output from 32 properties aggregated 101,132 
tons of ore, of an estimated value of $1,700,000. For the year 1901 
the value of the output of gold, copper, and silver increased, and that 
of lead decreased, with a result of a net increase in the value of the 
output for 1901 over that of 1900 amounting to about $2,000,000. In 
this total the copper shipments constitute the chief factor, their value 
as compared with the combined values of gold, silver, and lead ship- 
ments being roughly at a ratio of 23 to 16. The output for the present 
rear promises to show a continued increase. The value of the approxi- 
mated total output of Bingham to 1899, inclusive, as calculated from 
the most complete data obtainable, is between $26,000,000 and 
$27,000,000. 
AREAL GEOLOGY. 
Stratigraphy. — In a general sense the sediments in the Bingham 
district are siliceous. Exceptions to this general character — first 1 lie 
relatively thin intercalated limestone, and second the calcareous 
shales — are, however, of greatest economic importance. The entire 
section may be broadly divided on lithologic grounds into two parts — 
i a lower, which is characterized by a great thickness of massive normal 
quartzite with a few relatively thin interbedded limestones, and an 
upper, which is composed largely of quartzites with black calcareous 
shales, sandstones, and impure limestones. 
The lower part includes three series of beds of geological and 
economic interest. The first of these is a thin calcareous member 
associated in quartzite with other limestones which cross Butterfield 
Canyon near its head at an elevation of about 7,000 to 7,500 feet. It 
carries a fauna which has been correlated by Dr. G. II. Girty with 
those of Lower Carboniferous age in the Mississippi Valley. Over- 
lying this is a thickness of about 1,250 feet of massive quartzite. 
The second series is composed of at least two heavy limestones, which 
aggregate, with intercalated quartzite, about 5,000 to 8,000 feet in 
thickness. In these limestones have been found a large portion of 
the ore bodies of this camp, and near the top of the lower limestone 
of this series occurs a fauna characteristic of the Upper Carboniferous. 
Extensive deformation by Assuring, faulting, and intrusion gives rise 
to some uncertainty as to the normal succession from this point to 
the top of this lower great division. The structure of an extensive 
region to the south, west, and north of this immediate area, beyond 
that which the writer could find time to study, must be carefully 
determined before this and some other large structural problems 
involving this immediate area can be conclusively settled. But the 
field evidence gained by thorough study in this immediate area and 
he country immediately adjacent thereto indicates that overlying 
his second limestone series is a thickness of approximately 1,500 feet 
m )f quartzite with intercalated thin blue limestones and calcareous 
