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Updated: June 13, 2025
We had now left the timber behind us, its place being taken by a low, straggling scrub of acacia, generally known as "Mulga," which continues in almost unbroken monotony for nearly two hundred miles; the only change in the landscape is where low cliffs of sandstone and ranges of granite, slate, or diorite, crop up, from which creeks and watercourses find their way into salt swamps and lakes; and occasional stretches of plain country.
In one of these boats was a diorite hatchet of the kind characteristic of Neolithic times; another, the wood of which was perfectly black, had become as hard as marble, and in it was a cork plug. Then, as now, the oak which yields cork was foreign to the cold climate of Scotland. We will quote but one of the discoveries made in England.
Coloured stones, such as granite, basalt, diorite, serpentine, and alabaster, sometimes escaped this law of polychrome; but in the case of sandstone, limestone, or wood it was rigorously enforced. If sometimes we meet with uncoloured monuments in these materials, we may be sure that the paint has been accidentally rubbed off, or that the work is unfinished.
Material: a grey or a white limestone most usual; tufa and dolerite also used. Flint carved and engraved cylinder- seals, of limestone, black basalt, jasper, diorite, &c. Shell. Very largely used for decoration; small plaques of nacre often engraved with scenes of men worshipping, &c. Seal-cylinders of shell. Wood. Burials.
At Argecilla, twenty leagues from Madrid, Vilanova discovered a regular workshop, in which were knives and flint arrow-heads, together with some very primitive pottery made of clay that had evidently been brought from a distance, as there is none in the district in which the pottery was found, In an upper deposit Vilanova collected more than two hundred implements made of diorite, a rock frequently used in Spain, some very remarkable celts of serpentine dating from the Neolithic period, and numerous fragments of very delicate pottery.
The passage from slate through porphyritic diorite into granite may, I think, be best explained by the increasing degree of metamorphism, and at the same time a change of the original sediments at this point; granite being the last term of metamorphism of pure clays, or clayey sandstones, while bedded diorites are similarly formed from ferruginous and calcareous slates.
The primitive 'bucchero, still surviving alongside of the painted pottery, is very closely related to the imported vases found by Petrie in First Dynasty tombs at Abydos; and a further link with Egypt is afforded by the fact that vases of Proto-Dynastic Egyptian form in diorite and syenite were discovered in the south and east quarters of the palace at Knossos.
With it were picked up polished fibrolite, basalt, chloromelanite, serpentine, and diorite hatchets; evidently made in the neighborhood, as is proved beyond a doubt by the numerous chips and partly worked pieces lying about, as well as the discovery of no less than thirty polishers, many of them showing signs of long service.
Excavations near them have brought to light fragments of charcoal, masses of cinders, chips of silicate of flint, with numerous fragments of pottery, and tools made of quartzite, granite, schist, and diorite, similar to those met with under all the other megaliths of Morbihan.
She paused by a square block of diorite, and Paulus, who had not failed to observe how heavy her steps were, desired her to sit down; he pushed up a flag of stone, which he propped with smaller ones, so that Sirona might not lack a support for her weary back.
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