126 GEOLOGY OF ASPEN MINING DISTRICT, COLORADO. 
which brings down the Weber shales. Below the shales on the north side 
of the fault, which is the west side as shown in the section, the Silver fault 
and the Leadville dolomite have been computed to be present at about the 
depth represented, so that the throw of the fault at this point is about 1,300 
feet. 'The Weber shales are crumpled and folded against the fault, as 
shown. Farther west is the usual succession of Weber shales and Maroon 
sandstones, with at first a gentle and finally a slightly steeper dip. 
HUNTER PARK SPECIAL MAP. 
The Hunter Park district is a comparatively isolated area lying 
between the Lenado and Aspen districts. It offers comparatively few diffi- 
culties in mapping, on account of the simplicity of its structure. Most of 
the southeast portion is in granite, while most of the northwest is occupied 
by the red sandstones of the Maroon formation. In the northwest corner 
of the map the Triassic sandstones are represented as coming in above the 
Maroon. This representation is based on calculation rather than actual 
observation, for the difference between the Maroon and the Triassic sand- 
stones is so slight that the actual contact can scarcely be located in any 
case. 
Between the area occupied by the granite on the one hand and the 
sandstones on the other there is a narrow zone extending continuously with 
unbroken northeast course across the district. Throughout this belt there 
are numerous outcrops, affording good opportunity for satisfactorily solving 
the structure. The greatest break in the continuity of the rocks is offered 
by the drift-filled valley of Hunter Creek, which, however, is comparatively 
narrow. The drift in this valley is morainal in character, but has been 
somewhat worked over by stream action; hence it has become of some 
agricultural value. 
Pl. XV gives a fairly good idea of the general aspect of the Hunter 
Park region. The view was taken from a point at the southwest corner 
of the area mapped, looking northeast. The hill in the foreground to the 
right is heavily drift covered. In the foreground to the left and in the 
center of the picture is the drift-filled valley of Hunter Creek, while in 
the distance the peculiarly rounded outlines of the hill are characteristic of 
this Hunter Park area, being due to extensive glacial erosion. ‘The small 
