Example Sentences

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West of this line the island is composed chiefly of granite, with a large mass of granophyres, quartz porphyries and similar rocks forming the high mountains around Mt.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 4 "Coquelin" to "Costume" by Various

Gneiss, he thinks, resulted from the detritus of granitic rocks, by means of an inappreciable cement, and formed in a way analogous to that of the porphyries.

From Lamarck, the Founder of Evolution His Life and Work by Packard, A. S. (Alpheus Spring)

The igneous rocks, especially those of volcanic origin, constitute one of the most striking geological features of the county; they comprise felsites, rhyolites, quartz porphyries, enstatite diabases, andesite tuffs, diabases and granite.

From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3 "Capefigue" to "Carneades" by Various

Granites, porphyries and porphyrites belonging to this period occur in the Saxon Erzgebirge, the Harz, Th�ringerwald, Vosges, Brittany, Cornwall and Christiania.

From Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 3 "Capefigue" to "Carneades" by Various

These lower rocks, then—these greenstones, porphyries and granites, sienites and serpentines—thrust themselves in many places through the upper strata of the earth's crust, in such a way as to form mountain ranges.

From Harper's New Monthly Magazine Vol. IV, No. 19, Dec 1851 by Various