182

mottled in shades of red, yellow, brown, and green. In this locality contact
of burned and unburned areas is exposed on the post-glacial canyon walls
and nearly parallels the present surface. .The burning has, therefore, taken
place in post-glacial times, but in no place within the basin are the fires
known to be still smouldering. The overlying beds have slumped down to
occupy the position formerly occupied by the burned coal, and except on
very continuous exposures the position of a burned coal-seam may not be
detected. Comparison of an analysis of a sample taken only 1 foot from a
burned area with the analysis of a sample from the same seam much farther
from the burned area indicates that the coal close to the old fire was not
materially affected by the heat.”

TaBie LV
Analyses of Coals!
Northern Part of Carbon Creek Basin

Distance . .
. Thickness Vol. Fixed
Analysis No. sbovelbeseiet sampled H:0 comb. | carbon} 48h | Sulphur | B.t.u.
Feet Ft. Ins
1,000 2 iil 3-3 21-6 70-1 5-0 0-49 13,590
2,000 5 0 5-8 24-3 64-7 5-2 0-52 12,800
2,000 5 4 5-2 20-4 59-2 15-2 0-47 11,410
2,000 4 6t 2-1 22-0 69-4 6-5 SoB0 Till ecodos
(Boge 3. (0 2-6 17-9 49-8 29-7 0-54 9,580
2,250 a) 2-7 18-3 57-6 21-4 0-71 11,410
2,400 2 4 2°8 24-2 64-0 9-0 0-65 13,320
2,420 9 4-2 21-4 61-0 13-4 0-58 12,040
eyene 5 4t 5-5 24-8 61-5 8-2 Hasprl|soodope
3,500 4 108 2:8 25-8 63-9 7-5 0-67 12,930
Western Part of Carbon Creek Basin
LS ee eecee 1,000 Pt 5-0 19-5 72-1 | 3-4 | 0-46 13,320
Southern Part of Carbon Creek Basin
Des onaaooadsons 1,000 8 Ol 4-5 15-6 66-9 13-0 0-36 12,090
Ibe Sedanadsodsnn 2,500 2 6 2-5 16-4 77-5 3-6 0-50 14, 180
TE abe so Aone 3,000 2 10 2-0 20-0 69-7 8-3 0-76 13,470
Central Part of Carbon Creek Basin
(Except Eleven Creek, See Table V)
3, 500—4, 000 2 10 4-4 25-6 65-4 4-6 0-57 12,850
3,500—4, 000 Gz 7:3 22-7 55-4 14-6 0-48 10, 620
3, 500—4, 000 2 69 1-8 21-5 75-6 1-1 0-52 14, 620
3,500—4, 000 3 5 1-5 30-2 64-3 4-0 0-78 13,980

t Taken by J. D. Galloway—full width of seam, but excluding 5 inches of bone.

{ Taken by J. D. Galloway—full width of seam, excluding 2 inches of shale parting.
§ Base of seam not accessible.

|| Probably thickened locally at crest of a fold.

{| Five- to six-foot seam, base not accessible.

1 From Mathews (1947).