| 释义 |
laccolith Geol.|ˈlækəlɪθ|
[f. as prec. + λίθ-ος stone.]
= laccolite. (Now commoner in use than laccolite.)
1879Dana Man. Geol. (ed. 3) 840 The laccolith, as is seen, rests on horizontal strata. 1944A. Holmes Princ. Physical Geol. vi. 86 There are few good examples of laccoliths in Britain, though many stocks have been wrongly called laccoliths. Stocks are discordant intrusions, whereas laccoliths, like sills, are concordant. 1960B. W. Sparks Geomorphol. vii. 151 Laccoliths, which are closely related to sills but which were formed from a magma too viscous to spread far, may form local dome-like features when exposed by erosion.
Hence laccoˈlithic a., of, pertaining to, or characteristic of a laccolith.
1896Jrnl. Geol. IV. 741 The hypothesis..that the granites are batholithic, not laccolithic. 1898Ibid. VI. 705 When vertical displacement with faulting is one of the chief characteristics of the intrusion, a distinction from normal laccolithic intrusion should be recognized. 1933[see bysmalithic a.]. 1968R. W. Fairbridge Encycl. Geomorphol. 281/2 The Devil's Tower of Wyoming is sometimes claimed to be an eroded laccolithic dome. |