THE BURDEKIN
TRANSITION FROM THE DEPOSITORY TO THE PRIMITIVE ROCKS
THACKER'S RANGE
WILD FIGS
GEOLOGICAL REMARKS
THE CLARKE
THE PERRY.
As this place afforded every convenience for killing and curing another bullock, we remained here for that purpose from the 29th March to the 2nd of April. The weather was favourable for our operations, and I took two sets of lunar observations, the first of which gave me longitude 146 degrees 1 minutes, and the second, 145 degrees 58 minutes. The mornings were generally either cloudless, or with small cumuli, which increased as the day advanced, but disappeared at sunset; the wind was, as far as I could judge, northerly, north-easterly, and easterly.
April 2.--The Suttor was reported by Charley to be joined by so many gullies and small creeks, running into it from the high lands, which would render travelling along its banks extremely difficult, that I passed to the east side of Mount McConnel, and reached by that route the junction of the Suttor with the newly discovered river, which I called the Burdekin, in acknowledgment of the liberal assistance which I received from Mrs. Burdekin of Sidney, in the outfit of my expedition. The course of this river is to the east by south; and I thought that it would most probably enter the sea in the neighbourhood of Cape Upstart. Flood marks, from fifteen to eighteen feet above the banks, showed that an immense body of water occasionally sweeps down its wide channel.
I did not ascend Mount McConnel, but it seemed to be composed of a species of domite. On the subordinate hills I observed sienite. The bed of the river furnished quite a collection of primitive rocks: there were pebbles of quartz, white, red, and grey; of granite; of sienite; of felspathic porphyry, hornblende, and quartz-porphyry; and of slate-rock.
The morning was cloudless. In the afternoon, heavy cumuli, which dissolved towards sunset; a strong wind from the north and north by east.
A very conspicuous hill, bearing E.N.E. from the junction of the rivers, received the name of Mount Graham, after R. Graham, Esq., who had most liberally contributed to my expedition.
Mr. Gilbert found a large calabash attached to its dry vine, which had been carried down by the waters. Several other very interesting cucurbitaceous fruits, and large reeds, were observed among the rubbish which had accumulated round the trees during the flood.
April 3.--We travelled up the Burdekin, in a north-north-west direction, to latitude 20 degrees 31 minutes 20 seconds. The country was hilly and mountainous; the soil was stony; and the banks of the river were intersected by deep gullies and creeks. The forest vegetation was the same as that on the lower Suttor. Among the patches of brush which are particularly found at the junction of the larger creeks with the river, we observed a large fig-tree, from fifty to sixty feet high, with a rich shady foliage; and covered with bunches of fruit. The figs were of the size of a small apple, of an agreeable flavour when ripe, but were full of small flies and ants. These trees were numerous, and their situation was readily detected by the paths of the natives leading to them: a proof that the fruit forms one of their favourite articles of food. The drooping tea trees, which had increased both in number and size, grew in company with an arborescent Calistemon, along the water's edge; and a species of Eucalyptus, somewhat resembling Angophora intermedia, was discovered at this spot: it occurs frequently to the northward, and is common round the gulf of Carpentaria. The small Acacia tree of Expedition Range was frequently seen in the forest, and was covered with an amber-coloured gum, that was eatable, but tasteless: Hakea lorea (R. Br.), and Grevillea ceratophylla (R. Br.); the Ebenaceous tree, and that with guava-like fruit (lareya), were all numerous. The bed of the river was covered with the leguminous annual I noticed at the Suttor; it grew here so high and thick that my companions were unable to see me, though riding only a few yards from them.
Rock frequently crops out in the bed of the river, and in the neighbouring hills. Several hills at the right bank were formed by a kind of thermantide of a whitish grey, or red colour, and which might be scratched easily with a penknife. Other conical hills or short ranges, with irregular rugged crests, were composed of granite of many varieties, red and white, fine grained without hornblende, or containing the latter substance, and changing into sienite; and, at one place, it seemed as if it had broken through Psammite. I observed quartzite in several localities, and a hard pudding-stone extending for a considerable distance. We were, no doubt, on the transition from the depository to the primitive rocks; and a detailed examination of this interesting part of the country would be very instructive to the geologist, as to the relative age and position of the rocks.
A small fish, with yellow and dark longitudinal lines, and probably belonging to the Cyprinidae, was caught. Wind prevailed from the northward: the forenoon was cloudless; heavy cumuli in the afternoon.