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Updated: May 31, 2025
I found the grandeur of solitude, without any suggestion of human life, where huge rocks of gneiss and schist, having broken away from the sides of the gorge, lay along the margins and in the channel of the stream.
"As I was riding yesterday between Noble-house and Crook, on the road to this place, I fell in with a quarry of alpine limestone; it consists of four or five strata, about three feet thick, one of them single, and the rest contiguous; they all stand between the strata of slate and schist that are at the place nearly vertical.
Fragments of granite have been observed at Teneriffe; the island of Gomora, from the details furnished me by M. Broussonnet, contains a nucleus of micaceous schist: the quartz disseminated in the sand, which we found on the shore of Graciosa, is a different substance from the lavas and the trappean porphyries so intimately connected with volcanic productions.
Consequently, as might be expected, the directions of the river channels bear no apparent relation to the general strike of the rocks. Ascending, we passed the village of Kameti on a spur, on the face of which were strewed some enormous detached blocks of white and pink stratified quartz: the rocks in situ were all chlorite schist.
The face of the hill was very stony, and I found, on examination, that a great change had taken place in the rock-formation, the granite ranges having given place to chlorite schist. We reached Whaby's about 9 a.m. of the morning of the 27th, and received every attention and civility from him.
Northward of Concepcion, as far as Copiapo, the shores of the Pacific consist, with the exception of some small tertiary basins, of gneiss, mica- schist, altered clay-slate, granite, greenstone and syenite: hence the coast from Tres Montes to Copiapo, a distance of 1,200 miles, and I have reason to believe for a much greater space, is almost similarly constituted.
Off again at 7.30 P.M. till 2.45 A.M. About four miles from Moorahd, grey granite takes the place of the volcanic slag and schist that formed the rocks to that point. The desert is now a vast plain, bounded by a range of rugged hills on the south.
The boom booming of water dashing against or over the rocks is heard at a good distance from most of the burns in this upland region; hence it is never quite still. The rocks here are argillaceous schist, red and white. 19th February, 1867.
The rock, in other places less elevated, consisted of schist or slate in laminae, dipping to the east at an angle of 60 degrees. Some very rich ironstone also occurred on the surface. This day three large kangaroos were killed by our dogs, one of them having been speared very adroitly during the chase by a native who accompanied us from our last encampment.
The Wallanchoon road follows the west bank, but the bridge above having been carried away, we crossed by a plank, and proceeded along very steep banks of decomposed chlorite schist, much contorted, and very soapy, affording an insecure footing, especially where great landslips had occurred, which were numerous, exposing acres of a reddish and white soil of felspathic clay, sloping at an angle of 30 degrees.
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