180 GEOLOGY OF ASPEN MINING DISTRICT, COLORADO. 
Gulch, with the head of Tourtelotte Park in the distance. The cliff in the 
foreground is of blue limestone, and is probably a sort of escarpment, 
determined primarily by the Hallet fault. At the left is Copper Hill, and 
on the hill at the right is the Dixon shaft house. Pl. XXIV is a view from 
a point farther south, overlooking the main Tourtelotte Park basin. This 
is taken from near the Camp Bird mine, and shows in the center the Last 
Dollar and Justice shaft houses. The hill in the background is outside of 
the Tourtelotte Park mining map to the south, and the Justice fault runs 
approximately through the depression in the center. Pl. XXYV is a view, 
taken farther up the gulch, of an area shown in the upper left-hand corner 
of the preceding plate. It shows the uppermost workings of Tourtelotte 
Park near the point where the ore-bearing faults outcrop and pass into the 
air. At the bottom of the picture is the Last Dollar shaft house and dump, 
while farther up are the dumps of other mines, such as the O. K., Minnie 
Moore, North Star, and Silver Bell. At the left is Copper Hill, with the 
dump of the Copper King shaft on top. Beyond Tourtelotte Park the 
view looks across the Roaring Fork and other valleys to the summit of 
the Sawatch Range. 
SMUGGLER MOUNTAIN. 
Smuggler Mountain is outside the district of greatest disturbance, and 
does not contain any complicated faulting or folding. It has, however, 
been the source of enormous ore production, being intimately connected 
with Aspen Mountain and constituting the northern part of the rich 
mineral district which is centralized in Aspen Mountain and extends from 
the southern part of Tourtelotte Park to the valley of Hunter Creek. 
Workings are now nearly continuous between Aspen and Smuggler 
mountains beneath the Roaring Fork Valley. Although faulting in this 
region is not very extensive, yet there is developed in the mine workings, 
especially in the Smuggler and the Mollie Gibson, some complicated 
structure, which results from the action of faults of different systems and 
ages operating in a restricted field. 
Pl. XXVI is a view of Smuggler Mountain, with the town of Aspen 
in the foreground. At the base of the mountain, just to the right of the 
center of the picture, are the shafts and dumps of the Mollie Gibson, 
Smuggler, and Free Silver workings, while the great dump of the Cowen- 
