396 GEOLOGY AND GOLD DEPOSITS OF THE CRIPPLE CREEK DISTRICT. 
The developments comprise the Empire State or Orphan shaft, which connects 
with level 11 of the Isabella (elevation 9,650 feet), called 7 of the Empire State, 
the elevation of the collar being about 10,550 feet; and the Maloney shaft, located 
300 feet farther south and 400 feet deep. Drifts and crosscuts probably add up 
to 4,000 feet. The workings on the Empire No. 2 vein have already been described. 
Both shafts are in breccia, as are the workings on lower levels near the Buena 
Vista vein, but on the western side of the crosscut from the Maloney shaft the 
drifts soon run into latite-phonolite through an indistinct contact. In one of 
the stopes 30 feet above level 4 the vein has a sharply defined central seam of 
fluorite, 2 inches wide, with several smaller seams on each side, and breaks with 
fairly well-defined foot and hanging walls. Twenty feet southwest from this 
place the same width is shown, hut the vein consists of twelve very narrow veinlets 
of fluorite, with occasional small quartz vugs. On level 10 of the Isabella, at the 
east end of the stope, the vein shows a well-defined seam surrounded by silicified 
and pyritic breccia, gradually changing to normal rock within 1 foot on each side 
of the vein. 
The principal shoot worked from the Maloney shaft appears to begin in Pinto 
ground, it is said at the intersection with the so-called Harrington vein, which 
was not, however, identified at greater depth. It pitches steeply eastward down 
to level 4; the maximum length is 200 feet. Probably the same shoot is found 
again on levels 5, 6, and 7 of the Orphan shaft, corresponding to 9, 10, and 11 
of the Isabella mine, and lies chiefly on the west side of the Buena Vista vein, 
though on level 10 the stopes extend 30 feet north of it. Between level 9 of the 
Isabella and level 5 of the Maloney shafts 200 feet of backs should exist if the 
shoot really is continuous. 
PINTO MINE. 
INTRODUCTION. 
The Pinto mine is situated on the saddle between Bull Cliff and Bull Hill, just 
north of the main street of Altman. It is owned by the Free Coinage Gold Minins 
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Company. The production of the mine has been close to 81,500,000. The workings 
consist of a 575-foot shaft and about 5,500 feet of drifting and crosscutting. The 
elevation of the shaft collar is about 10,625 feet. 
GEOLOGICAL FEATL'RES. 
The principal rock of the mine is latite-phonolite. About 500 feet east-south¬ 
east of the shaft, on the 350-foot level, breccia begins and continues to the end of 
the workings. Three basaltic dikes are encountered in the mine. A large dike, 10 
to 20 feet wide, nearly vertical and with an east-northeast course, is cut in two 
places south of the shaft on the fifth or 550-foot level. It corresponds in direction, 
and in appearance also, with the large dike which can be traced on the surface from 
the Eagle mine to the Isabella mine. It may be called the Isabella dike. Two 
hundred and fifty feet south of the shaft the same drift crosses a second dike, 4 to 
7 feet wide, which strikes N. 25° W. and is practically vertical. This is known as 
the Pinto dike. It is characterized by the presence of brownish-black mica, and is 
