288 GEOLOGY AND GOLD DEPOSITS OF THE CRIPPLE CREEK DISTRICT. 
The Jeff Davis mine, near Fairview, on the High Line, has several veins, the 
most important being a northwest-southeast vein dipping about 60° NE. The ore 
was oxidized. The production is said to have been between $10,000 and $15,000. 
NORTH SLOPE OF IRONCLAD IIILL. 
Breccia occupies the upper part of the north slope of Ironclad Hill. The lower 
part shows schist and granite in two well-defined areas. Near the contact of schist 
and breccia are several small mines, which, however, have in the aggregate a fairly 
large production to their credit. 
JERRY JOHNSON MINE. 
The Jerry Johnson Mining Company owns the larger parts of the Jerry John¬ 
son claims Nos. 1 and 2, as well as the Arapahoe and Little Pedro claims. The 
output to 1904 is about $125,000. The developments consist of the Jackson shaft, 
450 feet deep; also two smaller shafts and about 1,000 feet of drifts and crosscuts. 
The elevation of the collar of the Jackson shaft is about 10,350 feet. The country 
rock is almost exclusively breccia, the workings approaching the schist contact in 
only one place. 
The two principal veins are the Jerry Johnson, striking about N. 20° W. and 
dipping 45° WSW., and the W. P. H. vein, which first courses almost due north 
and then changes to north-northwest, with a dip of 50° W. Both veins are oxi¬ 
dized throughout and appear as narrow seams of clay or drusy quartz with silicifi- 
cation extending for several inches on each side of the vein. In some places there 
are a few more narrow parallel seams, making the width of the vein range up to 4 
feet. The ore contains very little fluorite. 
On the Jerry Johnson vein little of value was found from the surface down to 
the 300-foot level, but along this level ore occurred from the crosscut north for a 
distance of 80 feet. The ore extended only 40 or 50 feet above the level and was 
taken out about 1 foot wide. At the end of the drift a steep cross seam is faulted 
2 feet by the vein, and a small bunch of ore occurred in the intersection. The 
same cross seam is faulted by the W. P. H. vein. No ore has been developed on 
the 350-foot level. 
The W. P. II. vein lies 100 feet to the northeast of the Jerry Johnson vein. 
Developments on the 300-foot level have shown good values, the shoot extending 
for 100 feet, practically up to the ground of the W. P. II. mine. The central clay 
seam is rich and the rock is taken out 4 feet wide for the screenings. The ore 
reaches 40 or 50 feet above the level to a series of flat seams which are apt to cut 
out the values. In the southern part of the shoot, in what was known as Vogel- 
man’s ground, these flat seams, however, carried values themselves in the foot of 
the vein. At the 400-foot level good values occur at intervals, but it is believed 
that the principal shoot pitches north on the vein and has not yet been reached. 
.This is just below the place where a rich pocket was found in 1904 in the W. P. H. 
mine. 
w. P. H. MINE. 
The property known as the W. P. II. mine, belonging to the Woods Investment 
Company, was in 1904 leased to Harrison & Sevier. The shaft is situated 300 feet 
