164 
Ft. 
In. 
... 15 
0 
... 0 
6 
... 1 
3 
... 0 
4 
... 0 
4 
... 0 
1 
... 0 
6 
... 0 
9 
... 0 
Oi 
... 0 
Oi 
... 1 
6 
0 to 0 
4 
ims 3 
0 
marked (a 
involved in the dolerite, while at the east side the section in Plate 
attest the presence of a good coal-seam before the destroying mass of molten dolerite 
f.,„ea it. «« banl. ot Koteita C.eb about hall.-tuile Jt.m 
ila moutl, tho folfowiug are .ocn lying hopinoutally. Tl.eit horizon cannot b. very for 
above the Daintree Seam. 
Dolerite (intrusive sheet), weathering siiheroidally 
Hardened blue shales (a) 
Blue shales, with jilants 
Lenticular ironstone band 
Blue shales 
Soft lenticular coal-seam 
Perruginous shales ... 
Blue shales, with plants 
Lenticular coal-seam 
Lenticular ironstone seam 
Blue shales ... 
Lenticular mass of mineral pitch (h) 
Blue shale, with plants, and very thin lentic 
The iuncture of the dolerite with the n.. — ^ , , 
above section, is very remarkable, and shows that the shales were broken and torn by 
the intrusion of the dolerite, as in Plate 51, fig. 5. nppimv an 
The mass of mineral pitch, (6) in the .above sectioiL appear to occupy 
irregular pocket in the shales, as shown in Plate 52, fig. 1. The ongm of a cavrty 
such a form is difficult to explain. . 
The next important coal-seam is named tho MacArthur. It m seen in Jack 
and MacArthur Creeks, on the right and left banks 
about eight miles above the mouth of Rosella Creek. Its position must be som 
distance above that of the seam met with at No. 19 Traverse Station by 
The MacArthur Seam on Jack’s Creek was prospected in 18/o in a driv . 
the Bowen Eiver Coal Association. The drive is said to have exposed - ^ 
five feet in thickness, but worthless owing to the intrusion of a sheet of dolerite 
Near the mouth of the creek, about twenty feet of fine-grtiined grey . gi 
sandstone bands, with plant-remains and grey shales, are .^^the 
almost horizontal sheet of dolerite, which forms the upper half of the Jow hill i 
angle between the creek and the river. The dolerite weathers spheroidally. The natu 
of the iunction of the igneous and stratified rocks is sketched in Plate 52, hg. 2. 
■in MacArthur Creek, the MacArthur Seam and other strata are seen assoc . 
with an intrusive dolerite as in the following section. The strata are horizontal 
12 
ej 
Dolerite (on top of bank) 
Burnt coal 
Grey shale 
Burnt coal, with shaly layers 
Hard grey ferruginous sandstone 
Burnt shaly coal 
Grey-browm sandstone, with plant-impressions 
Grey shales ■ • • _ 
Darker shales, with coaly laminae ... 
Bituminous coal (tolerable) 
.cShng'loal, with shaly laminae, the coal laminae of fair quality, 1 ft. to 
0 
6 
1 
0 
1 
to 0 
0 
0 
0 
. 0 
1 
in. 
0 
2 
0 
7 
4 
7 
7 
3 
9 
1 
1 
9 
