ASPEN SPECIAL MAP. 61 
1,000 feet or more. The combined throw of these two faults is probably 
not far distant from the entire throw of the Pride fault north of the point of 
junction. 
Going south from the northern extremity of West Aspen Mountain, 
where the Pride fault is first located in the Pride of Aspen mine, one passes 
successively to lower and lower formations, since the dip of the beds is 
steeply to the north. The Silurian dolomite, which is found on the west 
side of the fault in the Pride of Aspen mine, continues for some little distance 
to the south, the outcrop being made broader by the general parallelism 
between the bedding and the slope of the surface, and also by the general 
downfaulting of the end of the mountain to the south in parallel blocks. 
In one of these blocks, however, the position of the beds is so altered that 
the dolomite and limestone of the Leadville formation outcrop on the east 
side of the hill and lie against the Pride fault. This block is sandwiched 
between two others where only Silurian strata outerop. (See Section B, 
Aspen special map, Atlas Sheet X.) Going still farther south, one crosses 
over the steeply dipping Cambrian beds, with a thin included sheet of 
diorite-porphyry at the bottom, and so on to the basal granite. This 
eranite continues outcropping on the west side of the fault quite to the 
southern limit of the mapped area. 
On the east side of the fault there exists, in the Pride of Aspen mime 
and neighboring localities, the basal member of the Maroon formation, 
which is immediately overlain by the Weber formation a little to the south. 
From this place to the point where the Saddle Rock fault splits off from 
the Pride fault there is continuous shale in outcrop on the east side. ‘he 
point of division is in the vicinity of the Pioneer tunnel. Farther south 
one comes successively upon lower and lower formations in the block 
between the two faults; thus the Parting Quartzite and the Silurian dolo- 
mite are successively passed over, and at the very summit of the hill the 
Cambrian quartzite outcrops and has been cut by tunnels. Just south of 
this there comes in granite underlying the quartzite; there is here, there- 
fore, granite on both sides of the Pride fault, and its course can not be 
followed farther, nor can the amount of its displacement be known. It is 
represented on the Tourtelotte Park special map (Atlas Sheet XII) as run- 
ning a short distance farther south, and then as dying out or stopping in the 
vicinity ef an east-west fracture; this, however, is purely arbitrary. It is 
