348 GEOLOGY AND GOLD DEPOSITS OF THE CRIPPLE CREEK DISTRICT. 
three shafts on the property, the deepest attaining 375 feet, with 800 feet of drifting. 
Yen* little work has been done lately. The general country rock is breccia. The 
old shaft, visited by Penrose in 1S94, is about 200 feet deep and the upper level 
only is accessible. A basalt dike 1 foot wide and about vertical runs through the 
shaft with a course N. 5° W. Sixty feet north of the shaft the dike branches, one 
branch curving around to the east until it has a course of about N. 75° E. South 
of the shaft the dike turns N. 35° W., and a phonolite dike appears alongside the 
basalt. This phonolite dike is very small near the shaft, but widens to about 2 
feet at the south face of the drift, about 80 feet south of the shaft. It is intersected 
by the basalt dike. The ore occurred in the basalt, particularly where fissures 
come in from the walls. 
Northeast of the old shaft, near the road, is a new shaft, 400 feet deep, sunk 
by lessees. The basalt dike is here about vertical and is reached by short cross¬ 
cuts from the shaft. The average width of the dike is about 2 feet. It constituted 
an ore body above and a short distance below level 1, the ore occurring in the dike 
itself, usually richest on the west side. The average value of the ore was about 
$15. Tellurides occur in fractures, accompanied in many places by an obscure 
greenish mineral, possibly roscoelite, said to be indicative of good ore. 
