| 释义 |
miarolitic, a. Petrol.|miːərəʊˈlɪtɪk|
[ad. Ger. miarolitisch (H. Rosenbusch Mikrosk. Physiogr. (ed. 2, 1887) II. 39), f. It. dial. miarolo, name of a kind of granite containing cavities + -lit -lite: see -ic.]
Characterized by irregular cavities into which well-formed crystals project; also applied to the cavities themselves.
1895A. Harker Petrol. ii. 31 Vacant spaces are apt to occur, into which project the sharp angles of well-formed crystals. This miarolitic or drusy structure is more or less marked in some granites (e.g. the Mourne Mts in Ireland). 1931A. Johannsen Descr. Petrogr. Igneous Rocks I. iii. 36 Miarolitic cavities are generally irregular and angular in form, and are seldom more than a few inches in diameter. 1970Nature 28 Nov. 850/2 The nepheline gabbro..is a subangular block coated by a thin crust of MnO2... The texture is ophitic and miarolitic. |