394 GEOLOGY AND GOLD DEPOSITS OF THE CRIPPLE CREEK DISTRICT. 
sometimes applied to it. It will be more convenient to describe the deposit as a 
whole rather than each property separately. It has not been possible to ascertain 
the total production, but it is probably not far from $200,000. 
The developments comprise three shafts, named the Edwards, Saunders, and 
Murphy, the last two GOO feet apart and respectively 475 and 450 feet deep, surface 
elevations ranging from 10,470 to 10,516 feet. In addition levels 10 and 11 of the 
Isabella have opened the vein at depths of 725 and 840 feet below the surface. There 
are probably 4,000 feet of drifts and crosscuts. 
GEOLOGICAL FEATURES. 
The croppings are near the contact of breccia and the mass of latite-phonolite 
which farther south, at the Buena Vista incline and the Lee shaft, narrows to 
dike-like proportions. The western part of the outcrop is in latite-phonolite. 
The old workings of the Murphy and Saunders shafts were not visited, but on 
level 10 of the Isabella a large mass of dense phonolite, not known on the surface, 
has been exposed. It is probably one of those flat intrusive bodies so common in 
this district. The phonolite begins a short distance north of the big stope at the 
intersection with the Buena Vista vein and continues for several hundred feet to 
the end of the drift, about halfway between the projection of the Saunders and 
Edwards shafts. A crosscut south connecting with an upraise to the Wrockloff 
workings passes into breccia 200 feet from the vein. 
The same body of phonolite appears on level 11, where the impoverished 
vein at the crossing with the Buena Vista is in this rock. Phonolite appears again 
on this leve 1 for 200 feet east of the projection of Saunders shaft. Another mass 
of phonolite of more dike-like form was noted on the same level 1,000 feet from 
the Buena Vista intersection, where the drift leaves Empire No. 2 vein and turns 
into a south crosscut. A basic dike, probably the Burns dike, here crosses the 
vein and is locally contained in phonolite. 
The Pinto dike is crosscut 150 feet east of the Burns dike. Both have been 
followed for some distance. At the intersection with the Empire No. 2 vein the 
Pinto dike has been faulted 10 feet, the southern part of it being thrown to the east. 
The appearance of gneissoid granite on level 11 is of interest, as no older rocks 
appear on the surface above. The exact point where the Emma vein enters the 
granite on level 11 is 1,400 feet N. 80° W. from the Buena Vista incline, while on 
the surface it is a full half mile to the nearest outcrop of older rocks. For some 
distance back of the contact the breccia contains much granite; the contact itself 
is fairly sharp and stands very steep; the granitic rock is a somewhat sheared and 
gneissoid Pikes Peak granite, with large crushed orthoclase crystals. It is not ' 
brecciated like the isolated, area on the west side of Bull Hill. The same rock 
continues for 400 feet west side of the contact to the end of the drift, and is said 
by Mr. L. S. Grant to continue 400 feet farther to the end of a south crosscut, 
which, however, it was not possible to enter. 
THE VEIN. 
As stated above, the Empire No. 2 vein strikes N. 78° W. and has been fol¬ 
lowed for 1,200 feet on one of the upper levels, as well as on Isabella level 11. The 
dip is very steep to the north; either it is somewhat irregular or there exist on 
