bysmalithn.
/ˈbɪzməlɪθ/ Geology.
A large roughly cylindrical body of igneous rock which, when it was forced upward, lifted up the overlying rock.
ΘΚΠ
the world > the earth > structure of the earth > structural features > discontinuity or unconformity > [noun] > intrusion > others
laccolite1877
xenolith1894
bysmalith1898
stock1898
autolith1900
bathylite1902
phacolite1909
phacolith1910
cupola1911
lopolith1918
1898 J. P. Iddings in Jrnl. Geol. (Chicago) 6 706 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.
1905 T. C. Chamberlin & R. D. Salisbury Geol. I. 477 Between the bysmalith and the laccolith there are various gradations.
Derivatives
bysmaˈlithic adj. characteristic of a bysmalith.
ΘΚΠ
the world > the earth > structure of the earth > structural features > discontinuity or unconformity > [adjective] > intrusive > others
xenolithic1900
batholithic1912
bysmalithic1933
lopolithic1959
1933 R. 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.
This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2018).
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n.1898