TOURTELOTTE PARK SPECIAL MAP. 109 
syucline is unbroken as far as Spar Gulch, where the Justice fault is 
encountered, which has a considerable downthrow to the east. East of the 
Justice fault the beds dip at an angle equal to the slope of the hill, and so 
present their basset edges in outcrop on the eastern side of the hill in Cop- 
per Gulch. In the bottom of Copper Gulch the Copper fault is encountered, 
which has a slight downthrow to the east. This is, however, abnormal, 
being caused by the later movement of the minor east-west faults which 
have introduced much complexity in the structure of this locality. 
Hast of the Copper fault is a flat, easterly dipping fault, which forms, 
apparently, a sort of splinter between the Ontario and Copper faults, and 
which has probably no great persistence, as it certainly has no great throw. 
In the strata between the Ontario and the Copper faults appears the 
axis of the anticline which joins the Aspen Mountain syncline on the 
west, and which is indicated on East Aspen Mountain and is present in 
a large part of Tourtelotte Park. his tendency toward the assumption 
of a flat position, or even of a slight anticlinal structure, is also found 
in the Hunter Park and Lenado districts. In Lenado Canyon a’ slight 
anticline, resting against the granite, is fully exposed on a vertical cliff 
a short distance above the village, and the same structure, dying out 
toward the south, can be traced over a large part of the Hunter Park map. 
The Ontario fault, in this section, has a comparatively slight down- 
throw to the east, but the next fault to the east probably belongs to the 
same system, and it may well be that the two have split off from the main 
Ontario fault, which was traced farther to the south. In the block to the 
east of the fault last mentioned, which may be called Ontario No. 2, the 
beds have a position which indicates a slight syncline, resting against 
granite. The tendency toward this final synclinal structure is also shown 
in parallel sections farther south. The last fault shown on the map as 
existing in the granite is the continuation of a fault of the east-west system. 
Section B——In Section B there is shown on thé west, as before, the Castle 
Creek fault, and the steeply dipping beds which lie against it. In this case, 
however, the overthrown beds resume their normal position at a much less 
distance from the surface than in Section A. There are also shown two 
minor faults to the west of the Castle Creek fault, which are nearly parallel 
to the main fault, and divide the total throw, there being a continuous 
upfaulting to the east along each plane. The actual number of these slip 
