| 释义 |
dolerite Min.|ˈdɒləraɪt|
[a. F. dolérite (Haüy), f. Gr. δολερός deceptive + -ite: so called from the difficulty of discriminating its constituents.]
A mineral allied to basalt, containing feldspar (labradorite) and augite.
1838Lyell Elem. Geol. (1865) 594 The variety of basalt called dolerite. 1849Murchison Siluria xii. 294 Cut through by dykes and masses of dolerite. 1879Rutley Study Rocks xiii. 253 The basalts vary considerably in structure: the coarsely crystalline varieties, and those in which the different mineral constituents are sufficiently well developed to be distinguished by the naked eye, are termed dolerites.
attrib.1880L. Oliphant Gilead iii. 82 A small building of dolerite stone..bearing the marks of extreme antiquity.
Hence doleˈritic a., of the nature of dolerite.
1849Murchison Siluria xii. 293 Basalt and doleritic trap. 1868Dana Min. 343 Dolerytic and basaltic lavas. |