1881.] 



511 



[Stevenson. 



The sandstone, No. 1 of the section, caps the Muff directly north from 

 the shaft and is easily followed to Rockvale, where it is alongside of the 

 railroad. The Canon City Coal Company's shaft No. 1 begins in this rock. 

 A boring was made in creek bottom at about 500 feet from the shaft and it 

 begins in this ro(:k, though somewhat higher than the top of the shaft. 

 The record of the boring is 



10. 

 11. 

 12, 

 13, 

 14. 

 15. 

 16. 

 17. 

 18. 

 19, 

 20. 

 21. 

 22. 

 23. 

 24, 

 25. 



Sandstone 82 



Shale 17 



White sandstone 7 



Goal heel H 



Sandstone 10 



Soft shale 4 



Sandy shale 31 



Goal bed G 1 



Sandstone, hard 15 



Argillaceous shale 8 



Sandy shale 18 



Goal hed^ 



Sandstones and shales in thin beds 52 



Black shale 5 



Sandstone 2 



Goal bed G 



Sandstone and shale 3 



Black shale 21 



Sandstones and shales 20 



Goal bedB 



Black shale 22 



Goal bed A 3 



Arenaceous shale 9 



Black shale 5 



Sandstone and sandy shale 5 



8" 

 9'' 

 3" 



4// 

 4// 

 5" 

 8" 



6" 



8" 

 4// 



8" 

 7" 

 8" 

 10" 

 6" 

 1" 

 4" 

 7// 



1" 



Total 341' 6" 



The company's shaft at the time of examination was down 220 feet. Goal 

 beds Gr and H are thicker in the shaft than in the boring, the former being 1 

 foot 2 inches and the latter 1 foot 10 inches. The great sandstone. No. 1 of the 

 section, is nearly 120 feet thick. It varies somewhat in structure, as is 

 well shown in the railroad cut at Rockvale. In the boring it seems to be 

 a compact sandstone throughout and it shows a similar structure in the 

 shaft, but in the railroad cut, only a few yards from the shaft it becomes 

 shaly toward the middle, there being not less than 29 feet of shale exposed 

 in the cut. The rock is mostly massive, soft and reddish-yellow to buff 

 and bluish gray. It contains vast numbers of Halymenites major, of which 

 excellent specimens can be obtained at Rockvale. This fossil is most 

 abundant in the upper part of the rock. 



