HERENDEEN BAY GOAL FTELD. 107 
There seems to be no reasonable doubt that faulting has disturbed these beds, and the 
svidence obtained from the fossils indicates that the movements have been of sufficient mag- 
nitude to entirely cut off the coal in a southerly direction. 
The coal from the Johnson drift is solid, blocky, and clean, with an irregular fracture. 
Particles of amber are present. A specimen taken from a sack which had lain exposed for 
,wo years to the sun and rain was still in excellent condition. This fact is not in accord 
vith the statement given later in the report of the engineer of the l T . S. S. Albatross. 
On the right bank of Left Fork, between an eighth and a quarter of a mile from the main 
:reek, a steep cut is made by the creek through the coal-bearing sandstones exposing a 
lumber of seams. Measurements taken down the face gave the following section: 
Section of coal beds on Left Fork of Coal Cn < Tc. 
Ft. in. 
Crushed coal 7 
Shale 9 
Bony coal 1 
Shale and sandstone 6 6 
Coal, crushed 8 
Coal, fairly solid (obscured partially by slide) 10 
Shale, carbonaceous 3-4 
overed by slide 20 
Coal with bone (details not observed) 12 
Shale and coal 4 
Coal 2 8 
hale 6 
Coal 3 
lemainder hidden by slide. 
The above section was measured entirely on the surface, time not permitting sufficient 
xcavarion to reach clean material where more accurate details would have been available. 
t is probable that in a clean section the coal would measure less. 
It was through this bluff that the 30-foot fault was observed. The old A. C. Co. tunnel 
No. 2 on the map, fig. 6, p. 105) was apparently run on one of this series of seams (probably 
Dwer than the section given), and as it pinched out between 200 and 300 feet from the 
ntrance the presence of a second fault near the mouth of Left Fork might be inferred. 
On the divide between the east and west drainage at the head of the main fork of Coal 
!reek coal croppings were observed at an elevation of 1,8.50 feet. The strike of the rocks 
it this point was N. 40° E. and the dip 55° N. One scam of 5-foot average thickness was 
bserved, and across a surface of approximately 100 feet numerous croppings of weathered 
'oal were exposed. 
In 1890 the United States Fish Commission steamer Albatross tested 80 tons of coal from 
tie A. C. Co. tunnel which, with due consideration for the fact that the coal may have con- 
lined extra dirt from careless mining, was probably fairly representative of the field. 
The following extracts are from the report of the engineer of the Albatross: " 
\ The average consumption of the coal was at the rate of 25 pounds pet- square fool, of grate per hour. 
he boilers furnished the same amount of steam as when we have been using a fair quality of Welling- 
>n coal, but to obtain this result we had to burn from 20 to 25 percent more of the Herendeen Baycoal. 
The coal ignites readily and burns with a considerable flame, forming a loosely cohering coke which. 
reaks up into small pieces, thus a considerable amount of small particles of coal is lost through the 
rates. There was a large proportion of fine stuff in the coal which burned well, but contained an exces- 
ve amount of refuse matter. 
The refuse amounted to 26 per cent of the total weight of coal consumed. It consists of ash and cin- 
srs, no glassy clinker being found. The smoke produced is lighter in color than that of Wellington 
?al and less soot is formed. 
* * * It will be, however, absolutely necessary to store this coal under shelter, as il appears to 
bsorb moisture readily and the constant rains that have prevailed in this region during the present 
•ason would soon saturate it to such an extent as to greatly dimmish its value as a fuel. 
a Bull. U. S. Fish Commission, vol. 9, for 1889, Washington, 1891. pp. 282-283. 
