coal. 329 



SEDALIA DISTRICT. 



The Douglas mine. XI IIS IS opened (ill a small creek about 6 miles Milltll- 



east of Platte Canyon and 4 or 5 west of Sedalia. Two coal seams are 

 mined, the linear extent of which is undefined, but, from their thickness 

 and strong development in the pit, there is probably al least one-half or 

 three-fourths * » i* a mile of workable coal. In depth it doubtless extends far 

 beyond economic mining limits. 



The measures here have a strike X. 24 W., with an easterly dip of 

 about 73°. 



The horizon of the two coal seams is probably between sandstones B 

 and ( '. The upper, easternmost seam is s or 9 feet thick when- opened; 

 the other, 4 feet; a heavy sandstone, varying from 10 to 20 feet in thickness, 

 separating them. (Fig. A, PI. XVIII.) The seams were clear of partings 

 and bone within the limits of work at the time of examination. The coal 

 is jet-black, lustrous, hard, square-jointed or nearly so, and of good resist- 

 ance to atmospheric influences. Its structure and friability have been but 

 little influenced by the bending to which the strata were subjected in the 

 general uplift of the range. A slight amount of pyrite and resin is scattered 

 through it. 



SEDALIA DISTRICT To MOUNT CARBON. 



Various coal openings have been made between the Douglas mine 

 and Mount Carbon, the locality next north now worked. These are, in 

 succession, the Weightman, Archer, Deer Creek, Jones, and Wenrich or 

 Gilpin, all of which are reported as Inning occasionally yielded a slight 

 product, chiefly between the years 1870 and 1880. All are now caved 

 and beyond examination. The horizon, thickness, or character of the 

 coals can not he given. The strike of the measures included within this 

 distance is N. 15° to Is \Y.. or with the trend of the range, and their dip 

 is from 7") east to overturned. 



MOCNT CARBON DISTRICT. 



This designation applies to a short stretch of coal measures within a 

 half mile north and south of Hear Creek, including the prominent flat- 

 topped hill known as Mount Carbon. The valley of Bear Creek is here 



