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basalt 音標拼音: [bəs'ɔlt] n. 玄武巖 玄武岩 basalt n 1: the commonest type of solidified lava; a dense dark grey fine- grained igneous rock that is composed chiefly of plagioclase feldspar and pyroxeneBasalt \ Ba* salt"\, n. [ L. basaltes ( an African word), a dark and hard species of marble found in Ethiopia: cf. F. basalte.] 1. ( Geol.) A rock of igneous origin, consisting of augite and triclinic feldspar, with grains of magnetic or titanic iron, and also bottle- green particles of olivine frequently disseminated. [ 1913 Webster] Note: It is usually of a greenish black color, or of some dull brown shade, or black. It constitutes immense beds in some regions, and also occurs in veins or dikes cutting through other rocks. It has often a prismatic structure as at the Giant' s Causeway, in Ireland, where the columns are as regular as if the work of art. It is a very tough and heavy rock, and is one of the best materials for macadamizing roads. [ 1913 Webster] 2. An imitation, in pottery, of natural basalt; a kind of black porcelain. [ 1913 Webster] 40 Moby Thesaurus words for " basalt": aa, abyssal rock, bedrock, block lava, brash, breccia, conglomerate, crag, druid stone, festooned pahoehoe, gneiss, granite, igneous rock, lava, limestone, living rock, magma, mantlerock, metamorphic rock, monolith, pahoehoe, pillow lava, porphyry, pudding stone, regolith, rock, ropy lava, rubble, rubblestone, sandstone, sarsen, schist, scoria, scree, sedimentary rock, shelly pahoehoe, stone, talus, tufa, tuff |
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