"Miascite" Quotes from Famous Books
... extended over a large space. Mesotype and nepheline constitute, according to Girard, an important part in the composition and internal texture of basalt. The nepheline contained in basalt reminds the geognosist both of the miascite of the Ilmen Mountains in the Ural,* which has been confounded with granite, and sometimes contains zirconium, and of the pyroxenic nepheline discovered by Gumprecht near ... — COSMOS: A Sketch of the Physical Description of the Universe, Vol. 1 • Alexander von Humboldt |