BOUTWELL.] 
PARK CITY MINING DISTRICT, UTAH. 
85 
and this activity has continued and increased consistently to the 
present time. Since the middle nineties, when valuable ore bodies 
were discovered, outside of the previously productive area, in the 
Mayflower, Woodside, and Silver King properties, exploration has 
been carried on over a large tract, and the productive area has been 
widely extended. At present mining is extensively conducted in the 
Silver King, Daly- West, Ontario, and Daly- Judge properties; impor- 
tant work is being carried on in the Kearns-Keith, Keystone, Cali- 
fornia, Comstock, and other properties on the west; in the Little 
Bell, J. I. C, and Thompson groups on the south; and in the Nail- 
driver, Wabash, New York, etc., on the southeast. Work is con- 
templated for the coming season by owners of various properties on 
the eastern and northeastern borders of the district. 
Production. — The product of the Park City mines consists chiefly of 
silver, and, in minor quantities, of lead, copper, and gold. The pro- 
portionate value of these four metals (silver, lead, copper, and gold) 
in the present output may be roughly stated as 9.1 to 2.6 to 0.39 to 
0.28. The quantity and value of the output have increased strongly 
in recent years, and may be reasonably expected not only to have 
increased in 1902 but to continue that increase in the immediate 
future. The following table, taken from the report by B. H. Tatam 
in the Annual Report of the Director of the Mint for 1901, shows the 
kind, quantity, and value of ore produced in Salt Lake County, Utah 
(practically entirely from Park City), during the years 1900 and 1901. 
Kind, quantity, and value of ore produced in Salt Lake County, Utah, during 
1900 and 1901. 
Metal. 
1900. 
1901. 
Increase. 
Quantity. 
Value. 
Quantity. 
Value. 
Gold fine ounces. . 
Silver (coining value), 
..fine ounces.. 
Copper fine pounds. . 
Lead do 
Total. 
9,093.375 
3,931,205 
703,369 
46,982,647 
$187,976.74 
5,082,770.10 
113,875.44 
2,053,141.67 
13,731.376 
7,060,623.56 
2,477,080 
60,232,236 
$283,852.73 
9,128,887.03 
399,230.98 
2,610,465.11 
$95,875.99 
4,046,116.93 
285,355.54 
557,323.44 
7,437,763.95 
12,422,435.85 
4,984,671.90 
AREAL GEOLOGY. 
General geology of the region. — In its geological structure the Wasatch Range 
presents a type of extreme complication, contrasting strongly with the simplicity 
and regularity of its nearest neighbor, the Uinta Range. The simplest expres- 
sion of this structure would be that of a sharp north and south anticlinal fold 
over preexisting ridges of granite and unconformable Archean beds, whose axis 
has been so bent and contorted by longitudinal compression that it at times 
assumes a direction approximately east and west. In connection with the folding 
has been developed a widely-spread system of faulting and dislocation, in a direc- 
tion generally parallel with the main line of elevation, which has cut off and 
thrown down the western members of the longitudinal folds and the western ends 
