CHANGE IN THE GEOLOGY OF THE COUNTRY.
As we proceeded down the river, its current became weaker, and its channel somewhat deeper. Our attention was called to a remarkable change in the geology of the country, as well as to an apparent alteration in the natural productions. The cliffs of sand and clay ceased, and were succeeded by a fossil formation of the most singular description. At first, it did not exceed a foot in height above the water, but it gradually rose, like an inclined plane, and resembled in colour, and in appearance, the skulls of men piled one upon the other. The constant rippling of the water against the rock had washed out the softer parts, and made hollows and cavities, that gave the whole formation the precise appearance of a catacomb. On examination, we discovered it to be a compact bed of shells, composed of a common description of marine shell from two to three inches in length, apparently a species of turritella.
BANKS OF PETRIFIED SHELLS.
At about nine miles from the commencement of this formation, it rose to the height of more than 150 feet; the country became undulating, and a partial change took place in its vegetation. We stopped at an early hour, to examine some cliffs, which rising perpendicularly from the water, were different in character and substance from any we had as yet seen. They approached a dirty yellow-ochre in colour, that became brighter in hue as it rose, and, instead of being perforated, were compact and hard. The waters of the river had, however, made horizontal lines upon their fronts, which distinctly marked the rise and fall of the river, as the strength or depth of the grooves distinctly indicated the levels it generally kept. It did not appear from these lines, that the floods ever rose more than four feet above the then level of the stream, or that they continued for any length of time. On breaking off pieces of the rock, we ascertained that it was composed of one solid mass of sea-shells, of various kinds, of which the species first mentioned formed the lowest part.
It rained a good deal during the night, but the morning turned out remarkably fine. The day was pleasant, for however inconvenient in some respects the frequent showers had been, they had cooled the air, and consequently prevented our feeling the heat so much as we should otherwise have done, in the close and narrow glen we had now entered.
Among the natives who followed us from the last tribe, there was an old man, who took an uncommon fancy or attachment to Hopkinson, and who promised, when we separated, to join us again in the course of the day.
FACE OF THE COUNTRY.
As we proceeded down the river we found that it was confined in a glen, whose extreme breadth was not more than half-a-mile. The hills that rose on either side of it were of pretty equal height. The alluvial flats were extremely small, and the boldest cliffs separated them from each other. The flats were lightly wooded, and were for the most part covered with reeds or polygonum. They were not much elevated above the waters of the river, and had every appearance of being frequently inundated. At noon we pulled up to dine, upon the left bank, under some hills, which were from 200 to 250 feet in height. While the men were preparing our tea, (for we had only that to boil,) M'Leay and I ascended the hills. The brush was so thick upon them, that we could not obtain a view of the distant interior. Their summits were covered with oyster-shells, in such abundance as entirely to preclude the idea of their having been brought to such a position by the natives. They were in every stage of petrification.
In the course of the afternoon the old man joined us, and got into the boat. As far as we could understand from his signs, we were at no great distance from some remarkable change or other. The river had been making to the N.W., from the commencement of the fossil formation, and it appeared as if it was inclined to keep that direction. The old man pointed to the N.W., and then placed his hand on the side of his head to indicate, as I understood him, that we should sleep to the N.W. of where we then were; but his second motion was not so intelligible, for he pointed due south, as if to indicate that such would be our future course; and he concluded his information, such as it was, by describing the roaring of the sea, and the height of the waves. It was evident this old man had been upon the coast, and we were therefore highly delighted at the prospect thus held out to us of reaching it.