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Updated: May 25, 2025
In Mr. Stokes' collection, I have seen a beautiful example of this structure, in a specimen of obsidian from Mexico, which is shaded and zoned, like the finest agate, with numerous, straight, parallel layers, more or less opaque and white, or almost perfectly glassy; the degree of opacity and glassiness depending on the number of microscopically minute, flattened air-cells; in this case, it is scarcely possible to doubt but that the mass, to which the fragment belonged, must have been subjected to some, probably prolonged, action, causing the tension slightly to vary in the successive planes.
Calcareous deposits and frondescent incrustations on the coast. Remarkable laminated beds, alternating with, and passing into, obsidian. Origin of obsidian. Lamination of volcanic rocks. The whole is volcanic, and, from the absence of proofs to the contrary, I believe of subaerial origin. The fundamental rock is everywhere of a pale colour, generally compact, and of a feldspathic nature.
For her own part, though she might have wished it otherwise, Sylviana could feel nothing for him but pity and a kind of awe. At times the obsidian hardness of his eyes would push her senses toward the protective realm of fear; but always his words, and her own twisted purpose called them back. She was neither attracted nor repulsed, only determined.
The sphaerulites and the little nodules of obsidian in these rocks so closely resemble, in general form and structure, concretions in sedimentary deposits, that one is at once tempted to attribute to them an analogous origin.
I have seen a specimen of zoned obsidian from Mexico, in Mr. Stokes' collection, with the surfaces of the best-defined layers streaked or furrowed with parallel lines; and these lines or streaks precisely resembled those, produced on the surface of a mass of artificial glass by its having been poured out of a vessel.
Jadeite and nephrite are met with in the Lake Dwellings of Switzerland and Bavaria, as in the caves of Liguria and Sardinia; chloromelanite in France, and obsidian in Lorraine, in the island of Pianosa and in the Cyclades.
They have been worked simply by means of a splinter of obsidian, and are barbarous in execution, though interesting to the student of archaic art. The subjoined are specimens. No. 1 represents a four-winged genius of the Assyrian type, bearded, and clad in a short tunic and a long robe, seizing with either hand a winged griffin, or spirit of evil, and reducing them to subjection.
No purely Neolithic sites yet known, but lowest strata of remains at Sakjegozu and Sinjerli, on the Carchemish citadel, and in certain kilns at Yunus near by, and also pot-burials among house remains are of this Age. Stone implements: as in Greece, including obsidian of very clear texture, probably of inner Asiatic, not Aegean production. Bone needles and other implements. Pottery.
Springs of remarkably pure water, many of them possessed of medicinal power, abound in this neighborhood, and tourists slake an imaginary thirst with much interest at different ones of these. The Obsidian Creek runs slowly through this valley. Obsidian Cliff is the next object of special interest which is witnessed. It is half a mile long and from 150 to 200 feet high.
The islands of Lipari are formed of beds of tuff, penetrated by numerous dykes of lava, from which uprise two or three craters, formed of pumice and obsidian passing into trachyte. Volcanic operations might have here been said to be extinct, were it not that their continuance is manifested by the existence of hot springs and "stufes," or vapour baths, at St.
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