332 GEOLOGY OF THE DENVER BASIN. 



3 miles north of Bear Creek. Following is a summarized account of this 

 opening-, taken from the reports of Hayden 1 and Marvine. 2 



The entrance to tbe mine is by a slope of 45°, 170 feet in length, through 141 

 feet of sandstone. The strata are here nearly vertical in position, though at neigh- 

 boring points often with an easterly dip of between 70° aud 80°. There are three 

 seams of coal, 4 feet each, with 3i feet of clay intervening. Below the coal there is 

 a bed of clay 5 feet thick, and above 3i feet of arenaceous clay. The coal is com- 

 pact, makes an excellent fuel, and leaves a white ash. The mine had shipped 250 

 tons up to 1868 and was abandoned in 1872 for want of good communication. 



The Wheeler mine, 3 1 mile north of the Roe, was formerly worked 

 to a depth of 40 feet, furnishing coal of inferior quality; thickness of 

 seam, 7 feet. 



The Roe and Wheeler openings are still visible, but the surface in 

 their vicinity affords no ready section of the coal measures. 



A section of the measures at the Welch and Loveland mine, 4 by 

 Captain Berthoud, C. E., from notes on an open cut, follows: 



Feet. 



Coal, No. .">, easternmost bed 5 5 



Sandstone and clay 10 



Coal, No. 4 6 1 



Sandstone 64 



Fire-clay 3 



Coal, No. 3 6 3 



Sandstone Ci 



Five-clay 4 



Coal, No. 2" 2 



Fire-clay 5 



Coal, No. 1, westernmost bed 6 3 



Shale and sandstone 5 



The general strike of the measures in the vicinity of the above mine 

 is X. 30 to 32 W., with a dip westward (overturned) of 70° to 80°. 



At the Johnson mine, one-fourth of a mile north of the Welch and 

 Loveland, the coal is said by Mr. Marvine to be from 7 to 9 feet thick. It 



1 U. S. Oeol. Survey of the Territories, Report on Colorado and New Mexico. 1869, p. 35 . 

 - U. S. Geol. Survey of the Territories, Report an Colorado. 1873, p. 127. 



r. s. i fool, and I reog. Survey of the Territories, Report on Colorado, 1873. p. 127. 

 1 U. S. Geol. and (ieog. Survey of the Territories, P. V. Hayden, 1873. p. 127. 



Mined. 



Not mined. 



