CHAPTER XVTI. 
THE PEEMO-CAEBONIEEEOUS BY&Ym/L— continued. 
THE UPPER BOWEN FORMATION IN THE TYPE DISTRICT. 
Tit 
E Uppermost beds of the Middle Eormatioii dip at a comparatively low angle, and 
^nformably, to the east, beneath the lowest beds of the Upper Eormation in the Bowen 
iver, near the mouth of Cockatoo Creek. The dip gradually becomes flatter for about 
it miles up the river, till, at the mouth of Jack’s Creek, the strata are horizontal, 
ence they gradually rise for about five miles further up the river, when a bed of grey 
undstone, i'pping at 50° to S.W., and full of Strophalosia Glarlcei, Eth., is seen crossing 
® river. This sandstone, and the strata which succeed it for the next mile up the 
^^6r, all belong to the Middle Series. 
To the north of the Bowen Eiver, the Upper Eormation comes directly in 
act, through the agency of a fault, with the older metamorphic rocks of the Clarke 
consisting hero of quartzites, shales, greywackes, &c. 
With the exception of the coal-scams the strata of the Upper Eormation consist 
, I’®*' entirely of grey shales and greenish-grey sandstones, which are occasionally 
Dly. total thiclcness of the Upper Eormation cannot be estimated, as its upper 
s are not seen ; but from the lowest bed to the axis of a synclinal trough in Eosella 
j there must be at least 1,000 feet of strata, 
of Daintree Coal-Seam crops out in the bed of the Bowen Eiver, about a quarter 
base bulow the mouth of Eosella Creek. Its ])osition is evidently very near the 
iu Uj)per Series. Above the coal, a sheet of dolcrite, about twenty-five feet 
occupies the bed of the river for one hundred yards. The lower portion 
^kius^ ‘^°^®^'te has been converted into white trap. Its actual base is concealed by a 
a gap of perhaps ton feet intervening between the dolerite and the underlying 
The following is the section, which dips to E.8.E. at 7° : — 
strata. 
C<3 
Q) 
QQ 
o 
o 
.2 
C! 
Dolcrite, the lower part white trap 
Gap — room for 
Hurnt coal, partly columnar; somewhat coked in part; veins and 
pockets of white trap in upper part; concretions of ironstone 
m vertical and horizontal joints; nodules of decomposed pyrites; 
G-lossopteris recognisable in parts 
Black shale ... 
Burnt coal ... 
Black shale ... 
Burnt coal 
Black shale ... 
Burnt coal 
Bluish-grey shales 
Stony burnt coal with silky plant-debris {d) 
Bight porous crumbling coal, with concretionary nodules of bettei 
coal (e) 
Coaly shale 
Bight brownish-black laminated coal (some of the lamiuEe rather 
111 .°^Bshale than coal), fair quality ( 6 ) 
luish-black shales 
Uood coal (a) 
ft. 
25 
10 
in. 
0 
0 10 
1 
0 
0 
0 
7 
2 
0 
