PEOSPECT MOUNTAIN. 259 



The Great Prince and Minneapolis, on the north side of the syncline, 

 develop the Mount Zion Porphyry under the Weber Shales, of which in the 

 latter shaft a bed 30 feet thick seems to be included within the body of 

 Mount Zion Porphyry Between the Princeton (Q-52) and Little Blonde 

 tunnels and the St. Louis shaft the data furnished by intervening shafts show 

 the existence of a second minor syncline. The St. Louis reaches the lime- 

 stone after passing through 45 feet of Gray Porphyry and 30 feet of White 

 Porphyry. The Mary Ann shafts (Q-51 and Q-56) find White Porphyry 

 at the surface on the crest of a minor anticline. The shafts Q-45 and 

 Q-46 are in Gra}^ Porphyry at the surface, while the Little Blonde and 

 Princeton tunnels develop a considerable body of iron-stained chert, re- 

 placing the Blue Limestone and dipping to the north under the White 

 Porphyry. 



Little Evans anticline. — Immediately bclow thcse two tunnels is the apex 

 of the Little Evans anticline, whose main axis runs east and west. It is 

 also connected with the Yankee Hill anticline by a fold running south- 

 easterly and with the Big Evans anticline by one running southwesterly,, 

 between which is included the northern extension of the Little Stray Horse 

 syncline. The lowest formation exposed on the crest of the Little Evans anti- 

 chne is the Lower Quartzite, which is found below the Wash in the Luck- 

 now shaft (Q-54). The Norcom (Q-55) shaft, a little north, finds the 

 White Limestone dipping northward, and the Little Clara (Q-63), south of 

 this, penetrates the White Limestone to the underlying quartzite. A little 

 northwest of this the Lac-la-Belle finds Blue Limestone beneath the Wash„ 



The axis of the east and west fold, which sinks to the eastward, can 

 be traced in a line of shafts from the Lucknow to the Uncle Sam. The 

 Catawba tunnel (Q-41) runs in on the Blue Limestone just above the Part- 

 ing Quartzite. The Carbonate No. 2 (Q-37) shaft is sunk through a body 

 of Gray Porphyry, whicli is included in the Blue Limestone, into the Blue 

 Limestone below, at a depth of 140 feet. The Swing tunnel (Q-4'2) and 

 the Copenhagen (Q-'13) and Carbonate King (Q-36) shafts are in the Blue 

 Limestone on the south side of the fold In the Hancock (Q-31) and Prov- 

 idence (Q-32) shafts, on the crest of the fold. Blue Limestone dips with it 

 eastward. The Pacific shaft (Q-35) shows a southward dip in the Gray 



