单词 | sphenochasm |
释义 | sphenochasmn. Geology. (See quot. 1958.) ΘΚΠ the world > the earth > structure of the earth > [noun] > crust > discontinuity in crust rhombochasm1958 sphenochasm1958 1958 S. W. Carey in Continental Drift (Geol. Dept., Univ. of Tasmania, Hobart) 193 A Sphenochasm..is the triangular gap of oceanic crust separating two cratonic blocks with fault margins converging to a point, and interpreted as having originated by the rotation of one of the blocks with respect to the other. 1965 A. Holmes Princ. Physical Geol. (rev. ed.) xxix. 1086 The Gulf [of California] sphenochasm appears to have been filled with rheid mantle material in much the same way as the Red Sea. 1971 Nature 2 July 21/2 As the Gulf of Honduras sphenochasm completed its opening, the Yucatan and Nicaraguan cratons assumed their modern positions relative to North America. This entry has not yet been fully updated (first published 1986; most recently modified version published online June 2018). < n.1958 |
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