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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.
One, named Einerguendi by Brown, consisted of compact felspar, coloured green by chlorite, with grains of quartz and acicular crystals of felspar.
From Yass Plains to the very commencement of the level interior, every range I crossed presented a new rock-formation; serpentine quartz in huge white masses, granite, chlorite, micaceous schist, sandstone, chalcedony, quartz, and red jasper, and conglomerate rocks.
One of our coolies, loaded with crockery and various indispensables, had here a severe fall, and was much bruised; he however recovered himself, but not our goods. The rocks were all of chlorite slate, which is not usual at this elevation; the strike was north-west, and dip north-east.
The white chalkstone glitters from afar; the light grey feldspar assumes a warm flesh tint; the limestone becomes straw color; the crystals of hornblende flash like fire-flies; and the veins of white quartz, running with their nodules of serpentine and chlorite through the dark clay-slate, gleam as do chain lightnings through the clouds.
We have also evidence that the earliest strata were formed in the presence of a stronger degree of heat than what operated in subsequent stages of the world, for the laminae of the gneiss and of the mica and chlorite schists are contorted in a way which could only be the result of a very high temperature.
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.
Having hung up my instruments, I ascended a few hundred feet to some naked rocks, to the northward; they were of much-crumpled and dislocated gneiss, thrown up at a very high angle, and striking north-west. Chlorite, schist, and quartz, in thin beds, alternated with the gneiss, and veins of granite and quartz, were injected through them.
On the western declivity of the hill of Cabo Blanco, the gneiss is covered with a formation of sandstone, or conglomerate, extremely recent. This sandstone combines angular fragments of gneiss, quartz, and chlorite, magnetical sand, madrepores, and petrified bivalve shells. Is this formation of the same date as that of Punta Araya and Cumana?
A crystal to be worth preserving should be about an inch in diameter, and as transparent as is attainable. They occur in clear wine-yellow-colored crystals, from a quarter to half an inch in length; they occur in the chlorite in geodes of variable sizes, but generally two and a half inches in diameter, and which, when carefully broken in half, showed beautiful grottoes of these crystals.
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