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The largest of these two was one yard and a half wide and a foot deep, and appeared of a permanent character. We now ascended an undulating and rather more elevated tract of country of an oolitic limestone formation, most luxuriantly clothed with the richest grass, and having several lakes interspersed among the hollows between the ridges.
To the right on entering, against the eastern wall of the room, the visitor should first notice the fossil remains of various carnivorous animals, including the skulls and other osseous wrecks of hyenas, bears, &c., and also, carefully screened in an additional glass case, hereabouts, the lower jaw of a marsupial animal on a slab of oolitic limestone an early deposit, in which the highest class fossils generally found are the tortoises.
Three miles from where we had halted during the heat of the day, we passed some tolerable grass, though dry, scattered at intervals among the scrub, which grew here in dense belts, but with occasional openings between. The character of the ground was very rocky, of an oolitic limestone, and having many hollows on its surface.
Such differences in the fossils as distinguish the calcareous and argillaceous deposits from each other, would be described by naturalists as arising out of a difference in the STATIONS of species; but besides these, there are variations in the fossils of the higher, middle, and lower part of the oolitic series, which must be ascribed to that great law of change in organic life by which distinct assemblages of species have been adapted, at successive geological periods, to the varying conditions of the habitable surface.
The surface, the caves, the chinks, and the numerous pot-holes are compact limestone, often quite crystalline, while beneath it is oolitic, either friable or hard enough to be used for buildings. The hills are sand-blown, not upheaved.
We got, therefore, no Crustacea; neither did we get a single specimen of the Calamaries, which may be described as cuttlefish carrying hooks on their arms as well as suckers, the lingering descendants of a most ancient form, which existed at least as far back as the era of the shallow oolitic seas, x or y thousand years ago.
Though some series of strata classed together as Oolite, may range over a wider district than any one stratum of the series; yet we have but to ask what were the circumstances under which it was deposited, to see that the Oolitic series, like one of its individual strata, must be of local origin; and that there is not likely to be anywhere else, a series which corresponds, either in its characters or in its commencement and termination.
Immediately above the upper oolitic group in Buckinghamshire, in the vicinity of Weymouth, and other situations, there is a thin stratum, usually called by workmen the DIRT-BED, which appears, from incontestable evidence, to have been a soil, formed, like soils of the present day, in the course of time, upon a surface which had previously been the bottom of the sea.
Much of this great roadway is metaled with kunkur, an oolitic limestone found near the surface of the soil in Hindustan; and all Anglo-India laughed at the joke of an irreverent punster who, apropos of the fact that this application of kunkur to the road-bed was made under the orders of Lord William Bentinck, then governor-general, dubbed that gentleman William the Kunkurer.
Von Buch has described a compact limestone at Lanzarote, which seems perfectly to resemble the stalagmitic deposition just mentioned: it coats pebbles, and in parts is finely oolitic: it forms a far-extended layer, from one inch to two or three feet in thickness, and it occurs at the height of 800 feet above the sea, but only on that side of the island exposed to the violent north-western winds.
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