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单词 lag fault
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lag fault
lag fault n. Geology a type of overthrust formed when the uppermost of a series of rocks moves more slowly than the lower ones.
ΚΠ
1900 J. E. Marr in Proc. Geologists' Assoc. 1899–1900 16 461 These fissures..would have an outcrop similar to those of thrust-planes or over-faults which approached the horizontal; but they would differ from these, inasmuch as no inversion on a large scale would accompany them. We shall speak of them here as ‘lag’ faults.
1902 Ld. Avebury Scenery of Eng. 212 Besides these great overthrusts there is another type of relative earth movement which is known as a ‘lag fault’.
1947 Q. Jrnl. Geol. Soc. 103 100 There are several lag-faults in the district, but..only in the case of the Tirbach lag-faults is the evidence considered to be conclusive.
1963 E. S. Hills Elem. Struct. Geol. vii. 191 Lag faults.—These are low angle faults with normal fault displacement, that originate from the upward movement of the footwall block in a region of general thrusting. The hanging-wall block appears to have lagged behind in the regional movements.
extracted from lagn.1adj.
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