92 IRON ORES OF IRON SPRINGS DISTRICT, UTAH. 
The composition of the ore at the surface, as sampled by Lerch 
Brothers, is as follows: 
Composition of the Bull Valley district ores. 
[Analyst, Fred Lerch, Biwabik, Minn.] 
Iron. 
Phos- 
phorus. 
Across 150 feet, Pilot No. 9. 
Across 250 feet, Pilot No. 8. 
Across 60 feet, Pilot No. 7. . 
Pilot No. 13 
Across 40 feet, Pilot No. 7. . 
58.98 
62.38 
62.06 
66.40 
64.13 
0.195 
.217 
.163 
.072 
.434 
There has been a small amount of pitting, trenching, and tunneling, 
but these amount only to scratches in the upper parts of the deposits. 
DEPOSITS OF SIMILAR ORIGIN IN OTHER DISTRICTS. 
Ores similar to those of the Iron Springs district, consisting prin- 
cipally of magnetite in veins (not magmatic segregations in situ), in 
igneous rocks or near the contact of igneous rocks and limestone or 
in both combinations, are known at many localities in western North 
America, as follows: 
In Mexico, where nearly all the iron ores are of this character, 
their distribution and occurrence being summarized by Hill a and by 
Aguilera. 6 The Durango deposit is described in a number of papers. 
In several localities in San Bernardino County, Cal., c and in the 
Redding quadrangle of northern California/ 
In Lyon County, Nev., and in several other localities in the Great 
Basin/ 
In Stevens County, northeastern Washington/ Texada and Van- 
couver islands, British Columbia/ and Kamloops, British Columbia/ 
At Fierro g and Chupadera Mesa, New Mexico. 71 
In the Taylor Peak, White Pine, and Cebolla districts in Pitkin 
and Gunnison counties, Colo.*' 
At Iron Mountain, Missouri/ 
This list of localities is far from complete and no attempt is made 
to cite all the publications concerning the districts named. It is the 
a Hill, R. T., The occurrence of hematite and martite iron ores in Mexico: Am. J.our. Sci., vol. 45. 
1893, p. 112. 
b Aguilera, Jose G., The geographical and geological distribution of the mineral deposits of Mexico: 
Trans. Am. Inst. Min. Eng., vol. 32, 1902, pp. 503-505. 
c Leith, C. K., Iron ores of the western United States and British Columbia: Bull. U. S. Geol. Survey 
No. 285, 1906, pp. 194-200. 
d Diller J. S., Iron ores of the Redding quadrangle, California: Bull. U. S. Geol. Survey No. 213, 
1903, pp. 219-220. 
* Manuscript notes furnished authors. 
/ Leith, C. K., op. cit., pp. 195-196. Report on the iron ores of the coast of British Columbia, by 
the Provincial Mineralogist: Dept. of Mines, Victoria, B. C, 1903, 30 pp. 
g Manuscript furnished the authors by R. W. Hills. 
h Keyes, Charles R., Iron deposits of the Chupadera Mesa: Eng. and Min. Jour., vol. 78, 1904, p. 632. 
i Manuscript notes, summers of 1905 and 1906, Van Hise, Leith, Harder, and Ward. 
j Nason. Frank L., A report on the iron ores of Missouri: Missouri Geol. Survey, vol. 2, 1892, pp. 1-365. 
