| 单词 |
ciminite |
| 释义 |
ciminite Min.|ˈsɪmɪnaɪt, tʃɪ-|
[f. Cimini, the name of mountains in the neighbourhood of Viterbo, Italy + -ite1.]
A name for a type of trachytic lavas (see quot. 1920).
1896H. S. Washington in Jrnl. Geol. IV. 838 For these effusive rocks..I would propose the name of ciminite, from their earliest known and most characteristic locality. 1908Harker Petrol. for Stud. (ed. 4) 188 In examples from Bolsena in Italy the phenocrysts are of alkali-felspar, anorthite, augite, and biotite... One from the Viterbo district has labradorite in place of anorthite. A somewhat more basic type, from the Mti Cimini in the latter district, is styled ciminite. 1920A. Holmes Nomencl. Petrol. 59 Ciminite, an olivine trachydolerite containing phenocrysts of augite, olivine, and orthoclase-mantled labradorite in a trachytic groundmass. 1937A. Johannsen Descr. Petrol. III. 91 The type ciminite..is from Fontana Fiescoli, Cimino volcano, where it occurs in the form of flows resting on Pliocene clays. |
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