an electrical discharge of the corona type, occurring over mountains when the atmosphere is electrically disturbed.
a mineral, intermediate in the plagioclase feldspar group, having a play of colors and usually found as crystals in igneous rocks. Historical Examples These intermediate members are the lime-soda felspars known as oligoclase, andesine, labradorite and bytownite. Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 2 Various noun a feldspar mineral of the plagioclase series consisting […]
a dark-colored volcanic rock composed essentially of plagioclase feldspar and one or more mafic minerals, as hornblende or biotite. Historical Examples M. Dubois discovered these remains in the island of Java in andesite tufa of Pliocene or at least early Pleistocene age. The Cambridge Natural History, Vol X., Mammalia Frank Evers Beddard Surface eruption of […]
a dark-colored volcanic rock composed essentially of plagioclase feldspar and one or more mafic minerals, as hornblende or biotite. Historical Examples It is composed of andesitic lavas of the augite type, is pierced by many fumaroles, and has a crater in the solfatara stage. The Solomon Islands and Their Natives H. B. (Henry Brougham) Guppy […]
andf Architecture Neutral Distribution Format