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Updated: April 30, 2025
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.
It is true, as Humboldt has happily remarked, that when we pass to another hemisphere, we see new forms of animals and plants, and even new constellations in the heavens; but in the rocks we still recognise our old acquaintances the same granite, the same gneiss, the same micaceous schist, quartz-rock, and the rest.
In the meadow lands, when, for the purpose of sinking wells, the soil is penetrated to an immense depth, the workmen often come to thick strata of schist, in which they find imbedded trunks and roots of trees, and stalks of plants and ferns, which now grow in tropical climates only.
I do not know whether this formation, which is not frequent in the south of Europe, has hitherto been discovered in other parts of Spain. Angular fragments of Lydian stone, scattered along the valleys, seemed to indicate that the transition schist is the basis of the strata of greywacke. Near Corunna even granitic ridges stretch as far as Cape Ortegal.
In two pieces, specks, or rather paillettes, of gold were found lightly and loosely adhering to the "Maru ;" so lightly, indeed, that they fell off when carelessly pocketed Veins of schist still remained, but in the galleries they had been followed out to the uttermost fibril.
From the beginning, the excavation was carried on by day and night shifts, except on Sundays and holidays, until January, 1909, except that during the period from November, 1907, to October, 1908, the night shift was discontinued. Geology. The rock encountered may be classed as "gneiss"; its character varied from granite to mica schist.
ACTINOLITE SCHIST is a slaty foliated rock, composed chiefly of actinolite, an emerald-green mineral, allied to hornblende, with some admixture of garnet, mica, and quartz. MICA-SCHIST or MICACEOUS SCHIST is, next to gneiss, one of the most abundant rocks of the metamorphic series. It is slaty, essentially composed of mica and quartz, the mica sometimes appearing to constitute the whole mass.
Maps and admiralty charts call it Ram Head, but the real name is Ceann-a-Rama and popularly it is often styled Ardmore Head. The material of this inhospitable coast is a hard metamorphic schist which bids defiance to time and weather.
This celebrated man was beheaded on October the 29th, 1618. The third town, now the capital of the province, is fifty leagues west of the confluence of the Carony. Angostura, the longitude and latitude of which I have already indicated from astronomical observations, stands at the foot of a hill of amphibolic schist* bare of vegetation.
It was clever of the pair to hide the swag where they could oversee it every hour of the day, and they had chosen a safe location, too, for nobody wasted the effort to explore those domes and hogbacks now that they were known to contain no quartz. There was Anvil Mountain, for instance, a bold schist peak crowned with a huge rock in the likeness of a blacksmith's anvil.
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