460 GEOLOGY AND GOLD DEPOSITS OF THE CRIPPLE CREEK DISTRICT. 
level 3 what appears to be the same dike lies between the Independence and the West 
Independence lodes in the southern part of the mine, but turns southeastward 
across the Independence lode, crosses the Flat vein in the large stope just above 
level 3, known as the Little Bull Pen, and meets the granite-breccia contact about 
150 feet east of the Independence lode. Here it apparently joins with an irregular 
dike-like intrusion which follows the contact and may be seen in the main Inde¬ 
pendence and Bobtail drifts where they pass from breccia into granite. On level 4, 
the same Independence dike is crossed by the Independence lode about 75 feet south 
of the Independence-Bobtail intersection and is cut by the Bobtail northwest of 
that intersection. Thus on this level it exhibits no significant connection with 
either lode, though it contained a comparatively short ore shoot which branched 
in a southeast direction from the main Independence pay shoot. On level 5, a 
phonolite dike, apparently the same Independence dike, lies in the granite west of 
the Independence lode in the northern part of the mine and crosses to the west side 
of the No. 6 lode near the Portland line. The No. 1, Bobtail, and East Bobtail 
lodes accompany phonolite dikes for part of their courses on this level, the dike along 
the Bobtail fissure zone connecting with an irregular phonolite intrusion at the 
granite-breccia contact. On level 6, the Independence phonolite dike is followed 
by the main drift north to the breccia, in which, as usual, it becomes irregular. 
A little phonolite, possibly a part of this dike, occurs along the Independence lode 
near the Portland line. On level 7, the Independence phonolite dike has been 
followed northward from the shaft for a distance of 450 feet, to the breccia, and 
south of the shaft for about 1,050 feet. At the south end of the mine the dike 
terminates abruptly against a close cross fissure. There is no evidence of move¬ 
ment along this fissure subsequent to the plionolitic intrusion. The original 
dike fissure apparently ended at this point. On level 8, the Independence dike is 
cut near the shaft and followed northward for 350 feet in the main drift. Here it 
apparently branches, one branch turning northwestward and the other continuing 
north and probably connecting with some phonolite exposed at the south face 
of the East Independence lode, at the granite-breccia contact. On level 9, the dike 
runs generally north from the shaft for about 300 feet and then turns northwest, 
away from the Independence lode. On the 1,150-foot level the Independence 
dike accompanies the Independence lode for a distance of 700 feet north of the shaft 
to the granite-breccia contact. Be 3 mnd this point it v r as not seen. On the 1,400- 
foot level it runs north for 300 feet from the shaft, and then divides, one branch 
turning northwestward, as on levels 8 and 9, and the other continuing north to the 
contact. A west crosscut on this level exposes other phonolite dikes in the granite 
which have no apparent connection with lodes. A long southeast drift or crosscut 
on the same level, approximately along the granite-breccia contact, shows some 
very irregular dikes of phonolite and a number of sill-like intrusions of the same 
rock, dipping gently eastward and cutting both granite and breccia near the contact. 
The main phonolite and “ basalt ” dikes of the Strong mine are exposed in several 
drifts near the Independence-Strong line in the extreme western portions of several 
of the Independence levels, but as these dikes are fully described in connection 
with the Strong mine they need not be further considered at this place. With the 
exception of the Strong dike and some small decomposed basic dikes in the western 
