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Fundamental Rocks, polished, grooved, and scratched. Abrading and striating Action of Glaciers. Moraines, Erratic Blocks, and "Roches Moutonnees." Alpine Blocks on the Jura. Continental Ice of Greenland. Ancient Centres of the Dispersion of Erratics. Transportation of Drift by floating Icebergs. Bed of the Sea furrowed and polished by the running aground of floating Ice- islands.
The people believe that without it gold never occurs; and, if they collect the common yellow sand, it is to extract from it the darker material. Strangers have often mistaken this emery-like rock for tin, which occurs abundantly in the northern region. It is found striating white sandstone about Tákwá and other places in the interior.
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