COAL. 331 



of the great unconformity extending northward past G-olden to Coal Creek. 

 The dip of the highly inclined strata is between 7"> and '.to eastward, that 

 of the beds of gentle inclination, near the eastern base of Mount Carbon 

 about 15°, shallowing still further to the east of this. 



A cross-section of the more important part of the coal measures, 

 taken on the northern i';u-v of Mount Carbon, is given in Fig. 1!, PI. XVIII. 

 Four seams are moderately developed. Only the eastern two being of 

 workable thickness. All lie in the horizon between sandstones B and ( '. 

 the sketch involving about 43 feet of strata. This series of coal beds, 

 from indications afforded by old workings and prospects along their outcrop, 

 may extend with short interruptions tor a mile and a half both north ami 

 south, but that any single bed holds its width for this distance is extremely 

 doubtful. The depth to which they maintain their surface width is entirely 

 a matter of conjecture: it may be less than in theregions of more strongly 

 deyeloped beds, as, for instance, the Douglas; or, on the other hand, their 



width may increase with depth, the present outcrops being perhaps near 

 the periphery of the original deposits. 



The coal of the Mount Carbon mine, so far as exposed at the time of 

 examination, was quite free from partings; a single narrow but persistent 

 streak of bony material occurred in one seam about l! inches from the top, in 

 the other at the top. The coal is, like other foothill coals, bright, jet-black, 

 comparatively little fractured in the upheaval of the range, square-jointed, 

 and is said to contain very little sulphur, in the form of pvrite. and but 

 a slight amount of resin, which is uniformly distributed The present 

 opening upon the coal is by drift, about 125 feet below the top of the hill. 



Leaves, bark, and other vegetable debris occur in abundance in this 

 locality. 



Considerable coal was formerly shipped from a shaft at the foot of 

 Mount Carbon and from the Wilson shaft immediately north of Bear Creek, 

 both mines having been equipped with primitive hoisting plants. 



MOUNT CARBON TO GDI, DEN. 



Northward from the Mount Carbon district occur, in the order named, 

 the abandoned mines — Mann, Roe, Wheeler, Welch and Loveland, ami 

 Johnson. The Roe mine lies at the western base of Green Mountain, about 



