collier.] DALL RIVER AND SALT CREEK. 43 
The analysis is as follows: 
Analysis of coal (sample No. 160) from left haul- of Yukon 2 miles below Rampart. 
[Analyst, E. T. Allen, U. S. Gool. Survey.] 
Per cent. 
Water 16. 43 
Volatile cumbustible matter 41. 09 
Fixe.l carl >on 35. 22 
Ash 7.26 
100. 00 
Fuel ratio 86 
Coke noncoherent. 
Between Rampart and the mouth of the Tanana, on the north side 
of the Yukon, there are two large areas of sandstones and conglomer- 
ates that have been correlated with the Kenai, which have been 
reported to carry beds of coal, but no coal of economic importance has 
yet been found in them. 
Doll River. — On Dall River, about 70 miles from its junction with 
the Yukon, coal occurs which resembles the Rampart coal. The fol- 
lowing description is quoted from MendenhalFs report: a 
In the bed of Coal Creek, about 1 mile above its confluence with Dall River, there 
is an outcrop of lignite with irregular clay streaks, which measures, as far as can be 
determined from the imperfect exposures, approximately 11 feet in thickness. At 
the base of the exposure are 4 or 5 feet of firm, bright lignite, while the remainder is 
soft, dirty, and of poor quality. Blocks of the coal have been washed down the creek 
and some distance down Dall River without breaking up; but certain portions of the 
seam slake rapidly when exposed to the atmosphere. Although no opportunity was 
afforded for making practical tests, the lower 4 or 5 feet of this seam are believed to 
be lignite of good quality, while the remainder is probably of no value. This coal is 
contained in soft, gray, buff, or black shales, which are supposed to be Tertiary 
(Kenai series). 
Salt Creek. — Coal has been reported on Salt Creek by prospectors. 
Little definite information was obtained regarding it. These seams are 
said to be about 25 miles from the Yukon and may occur in an exten- 
sion of the same area of coal-bearing rocks as those of Dall River 
described by Mendenhall. 
Palisade lignite beds. — On the left bank of the Yukon 35 miles below 
Tanana bluffs of buff-colored silt and gravel rise to a height of 150 
feet above the river. This locality has been named the Palisades, but 
on account of the occurrence in the silts of abundant bones of the 
mammoth and other large mammals it is more popularly known as 
the Bone Yard. Silts of practically the same age occur in many places 
along the river. They are not known to cany lignite beds except at 
the Palisades/' These silts contain not only bones of the mammoth 
"Mendenhall, W. C, Reconnaissance from Fort Hamlin to Kotzebue Sound: Prof. Paper U. S. Geol. 
Survey, No. 10, 1902. See also Brooks, A. H., Coal resources of Alaska: Twenty-second Ann. Rept. 
U. S. Geol. Survey, pt. 3, 1902, p. 558. 
&Spurr, J. E., Geology of the Yukon gold district: Eighteenth Ann. Rept. U. S. Geol. Survey, pt. 3, 
1898, pp. 199 and 207. 
