266 GEOLOGY AND MINING INDUSTRY OF LEADVILLE. 



stone where the nortliwest and southeast zone through Fryei* Hill would 

 intersect the section-plane. 



Section c — Scction C runs through the crest of Little Ellen Hill in a 

 direction a lit«tle north of west, crossing the South Evans anticline opposite 

 the western point of the hill; thence following the south bank of Big Evans 

 gulch across the north slope of Fryer Hill, it passes through the mesa 

 just north of the railroad station in Nortli Leadville. It thus shows at its 

 east end the movement of the Mosquito fault; and, between this and the 

 mouth of South Evans gulch, the same regular easterly dipping beds 

 seen on the previous sections, slightly displaced by the movement of Ball 

 Mountain fault. On either side of its intersection with South Evans 

 gulch the considerable accumulation of recent material (r) represents the 

 moraine left by the Evans glacier. The White Porphyry above the Blue 

 Limestone, which in the preceding sections had thinned out near the crest 

 of the fold, is now supposed to extend back to the Mosquito fault, but in a 

 comparatively thin sheet; while in the crest of the South Evans anticline 

 the dike cut by the Silver Tooth bore-hole is represented as the source of 

 the White Porphyry sheet immediately overlying the granite. The plane 

 of the section intersects that of the Weston fault at its junction with the 

 Colorado Prince fault, and, on the theory of an inverted di]) to the latter 

 (assumed from the fact that granite overlies White Porphyry in the Boulder 

 incline), would also intersect the plane of the latter at the angle given in 

 the section. Beyond Weston fiiult the upward I'oll in the beds at the 

 Great Hope mine is graphically shown, and the syncline included between 

 this ridge and the crest of Yankee Hill. The section line passes north 

 of the summit of this hill, and beyond this point shows the increasing 

 thickness of the Wash or moraine material left by the Evans glacier. Its 

 intersection with the Iron fault is at the northern extremity of that fault, 

 whose movement is deduced fi-om data furnished by the Little Stella and 

 J. B. Grant shafts, on either side. Beyond this it passes through the Little 

 Stray Horse syncline, the anticline in the Dunkin ground, and the syn- 

 cline on the north side of Fryer Hill. The relative thinning out of the 

 Blue Limestone on Fryer Hill, where it is entirely replaced by vein ma- 

 terial, is to be remarked. This replacement, which is shown by a cross- 



