| 单词 | rift block |
| 释义 | > as lemmasrift block rift block n. Geology a block of depressed or elevated crust bounded by rifts or lying within a rift; a graben or a horst. ΘΚΠ the world > the earth > structure of the earth > structural features > mass > [noun] > of rock > between faults cleavage-mass1871 trough fault1883 horst1893 fault-block1897 thrust-mass1901 klippe1902 slice1914 rift block1915 nappe1922 1915 Bull. N.Y. State Mus. No. 177. 158 Out into the sea, lie (1) the joint or rift block, called Petite Ste Anne. 1929 D. Johnson in Compt. Rend. 15th Internat. Geol. Congr. II. 361 I shall consider only four major types of blocks included between bounding faults:..II. Rift blocks; or those relatively raised or lowered between normal faults. 1944 A. Holmes Princ. Physical Geol. xix. 439 The boundary faults are then regarded as steep upthrusts and the rift blocks as wedges (widening in depth) held down by pressure from the upriding sides. 2006 J. B. Colwell et al. in D. K. Fütterer et al. Antarctica vi. 333/2 The crust of the Adelie Rift Block and the outboard COT [= continent–ocean transition] zone is complex and distinctive. < as lemmas |
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