Page:Quarterly Journal of the Geological Society of London, vol. 28.djvu/344

 From the Head of Roper Creek and from the Bowen River : —

Streptorhynchus Davidsoni, Eth. Pl. XVII. fig. 1.

Spirifera striata, Eth. Pl. XVII. fig. 5.

— — couvoluta, Eth. Pl. XVII. fig. 3.

— — allied to bisulcata, Sow. Pl. XVII. fig. 4.

Productus Clarkei, Eth. Pl. XVII. fig. 2, 2a, 2h.

From the head of the Don River a suite of fossils has been forwarded by Rev. W. B. Clarke, whom we also have to thank for the specimens from the Nogoa and Dawson rivers.

These are said to overlie the auriferous series there, and consist of: —

Murchisonia carinata, Eth. Pl. XVIII. fig. 5.

Naticopsis (?) harpaeformis, Eth. Pl. XVIII. fig. 6.

Productus longispinus, Sow. Pl. XVIII. fig. 9.

Spirifera allied to striata, Sow. Pl. XVIII. fig. 8.

Griffithides dubius, Eth. Pl. XVIII. fig. 7.

Strophomena rhomboidalis, Eth. Pl. XVIII. fig. 1.

The whole of these forms agree with those found in the Hunter- river series of New South Wales, which there, as in Queensland, are found at the base of the great Palaeozoic coal-group of that Colony.

A sketch section of the lowest observed coal-seams, with several hundred feet of Productus beds resting on them, is here given (Fig. 9).

This section is observed about half a mile up a creek which joins the Bowen river one mile below the ford at the road crossing from

Fig. 9. — Sketch section of lowest observed Coal-seams near the Nebo Crossing of Bowen River.

a. Porphyrite.

b. Freshwater shales &c., with three coal-seams. Fragments of Glossopteris, but no marine shells.

c. Productus- and Spirifera-beds, with abundance of Carboniferous Mollusca.

Bowen to Nebo. The strata are here locally upheaved by the intrusion of the trap range which forms the source of the creek. At the junction of the creek, however, the dip is very slight, although the beds are quite conformable. The marine beds are generally argillaceous limestones, often very ferruginous ; whilst the upper beds are coarse grits and sandstones with interstratified shales. In these the impressions of Glossopteris are very common and sometimes beautifully preserved ; but I have never been able to find the fauna and flora unmistakably represented in the same bed.

The only section that has come under my observation in which