24 
COAL RESOURCES OF THE YUKON. 
[no. 218 
coal seams are bent to one side and probably faulted. The lignite zone, consisting 
of alternating beds of lignite, clay, and carbaceous shale, measures over 40 feet in 
thickness in places. The included lignite seams vary in thickness from a few inches 
up to 5 feet. A section 300 feet from the mouth of the tunnel showed over 11 feet of 
coal in seams separated by clay partings and beds, as follows: 
Ft. in. 
Lignite 1 6* 
Thin parting 
Lignite - - - - 5 
Carbonaceous shale - - - - 3 
Lignite - 6 
Shale 
Lignite 
Clav 
Lignite 
Clay .. 
Lignite 

1 
•) 

1 
3 
1 
3 
3 

1 

11 3 
The beds have a nearly cast and west strike, and dip in a southerly direction at 
angles of from 50° to 75°. 
A section in the lower workings showed: 
Ft. in. 
Shales 
Lignite, one thin parting 9 
Shales 2 
White clay - 2 9 
Alternating clays and shales 3 
Grayish clay 13 
Carbonaceous clay 3 3 
Lignite, one jmrting 3 
Carbonaceous shales and clays 6 
Soft sandstone with layers < if grit 10 
52 
The dip of the beds in the lower workings is much less than in the upper, and in 
places they are almost horizontal. 
The Cliff Creek lignite is very similar in appearance to the Rock Creek variety. 
It is dark in color, compact, and probably somewhat harder than the latter, as the 
inclosing rocks are more indurated. Dr. Hoffmann describes it as a lignite of superior 
quality closely approaching to a lignite coal. The following analyses were made in 
the laboratory of the Survey: 
Lignite from upper and lower working, Cliff Creek. 
Upper 
working. 
Lower 
working. 
11 vgroscopic water 
Per cent. 
8.57 
42.04 
45. 77 
3.62* 
Per cent. 
10. 58 
Volatile combustible matter 
40. 10 
Fixed carbon 
46. 74 
Ash 
2 58 
Coke 
100. 00 
19. 89 
100. 00 
19 32 
