| 释义 |
lopolith Geol.|ˈlɒpəʊlɪθ|
[See quot. 1918 and -lith.]
A large intrusive mass similar to a laccolith but having the base centrally sunken.
1918F. F. Grout in Amer. Jrnl. Sci. CXCVI. 518 Professor John Barrell has suggested that as igneous forms they deserve a distinct name... The name proposed by the writer is ‘lopolith’ (from [Greek] λοπάς, a basin, a flat earthen dish, and λίθος, a stone). Ibid., Pronunciation, lō'polith. 1962[see intrusive n.]. 1972M. P. Billings Struct. Geol. (ed. 3) xvi. 343 In plan, lopoliths are arcuate or circular.
Hence lopoˈlithic a.
1959Econ. Geol. LIV. 1208 Cooling of a lopolithic mass would proceed under the influence of two cooling gradients. 1968R. W. Fairbridge Encycl. Geomorphol. 281/2 The second type [of intrusive dome mountain] is the complex laccolith (or lopolithic) intrusion with broad sill-type interfingering tongues of igneous material penetrating the surrounding sediments. |