337 
inferior quality reduce the workable coal to sis feet. The dip is 11° to the S.S.B., 
and would apparently pass one hundred feet below the Tivoli seam. This seam is 
probably identical with the seam of the Eastwood Mine. The coal is moderately hard. 
Specific gravity, 1-31. 
Volatile in coking ... ... ... ... . ^ ___ _ _ 31 
Vised carbon ... ... ... ^ _ 01 
Ash ... ... ... ... ... ... ^ 8 
100 
■“ Goal Seam on Brislane Biver . — Two miles north-west from the Tivoli Mine, 
a large coal-seam is exposed on the bank of the Brisbane Eiver, just above the llocky 
Crossing. The total thickness of the seam is nearly thirty feet, but so full of bauds of 
shale that only three feet of the lower part could be worked, and even that of such 
inferior quality that it would be of little value as fuel. A specimen from the best part 
of the seam gave the following results. Specific gravity, 1'47. 
Volatile in coking ... ... ... ... ... ___ 22 
Fixed carbon 
Ash ... ... ... ... ... ... ... _ 27 
100 
“ In the gullies to the south-east of this outcrop the coal-seam shows with a 
reduced thickness of ten feet, of which five to six feet would be workable, though not 
of very good quality ; but it is probable that it improves to the southward, as it recedes 
from the Pine Mountain, where the coal strata are tilted up at high angles by the older 
serpentine rock, which forms the anticlinal axis of the mountain. 
The whole of the hereinbefore described seams of coal are of the bituminous class, 
and are associated with coarse sandstones and arenaceous shales. The weight of evidence 
in favour of the assumption tliat the whole of the workings are confined to two main 
seams, principally the upper one, and that the difference in the quality of the coal raised 
rom each mine has some relation to the distance from the northern margin of the 
coalfield ; and it may be inferred that the drift from the high ranges of Devonian rocks 
oposited more earthy matter along the margin than in the more distant and central 
portions of the great valley in which the coal was originally formed. 
Goal near TValloon. Eollo wing the general course of the Railway from Ipswich to 
■toowoomba, the first indications of coal are observable a little beyond Walloon Station, 
^ ere small blocks of coal are observable in the bed of a watercourse descending from 
e range in the Rosewood Scrub. Coal shales are visible in banks of the gullies, and 
l^wt below the basaltic cap of the range beds of black carbonaceous shale are exposed, 
lie the soil is mixed with fragments of hard, bright coal, indicating the jrroximity of 
seam of good coal, though the outcrop was not found. The character of this coal is 
from the bituminous coals worked near Ij)swich, being very hard, not 
injui’y by exposure to the weather, less brilliant in fracture, and does not 
a e much in coking. The volatile portion usually exceeds forty five per cent., pro- 
ducing a large proportion of oil or gas, according as it is subjected to a low or high 
d®ttiperature in distillation, and it may be observed that these characters apply 
0 almost all the coal-seams to the west of this locality. The coal has a specific 
gravity of I '30. 
Volatile in coking 
47 
Fixed carbon 
36 
.4sli ... ... ... ... 
17 
100 
X 
