| 释义 |
bysmalith Geol.|ˈbɪzməlɪθ|
[f. Gr. βύσµα plug + λίθος stone: see -lith.]
A large roughly cylindrical body of igneous rock which, when it was forced upward, lifted up the overlying rock.
1898J. P. Iddings in Jrnl. Geol. VI. 706 By this mode of intrusion, the vertical dimension of the intruded mass becomes still greater as compared with the lateral dimensions, so that its shape is more that of a plug or core. Such an intruded plug of igneous rock may be termed a bysmalith. 1905Chamberlin & Salisbury Geol. I. 477 Between the bysmalith and the laccolith there are various gradations.
Hence bysmaˈlithic a., characteristic of a bysmalith.
1933R. A. Daly Igneous Rocks & Depths of Earth vii. 132 We have no direct evidence that the intracrustal space occupied by a typical batholith was gained principally through a laccolithic or bysmalithic lifting of the roof. |