| 单词 | drag-fold |
| 释义 | > as lemmasdrag-fold drag-fold n. Geology a small fold in a bed that forms part of a larger fold or a fault; esp. one with the appearance of having been formed by shearing when stronger or more massive beds on each side of the folded bed moved relative to each other. ΚΠ 1911 U.S. Geol. Surv. Monogr. lii. v. 123 A common type of fold is a drag fold.., by which the formation becomes locally buckled along an axis lying in any direction in the plane of bedding. 1937 Geogr. Jrnl. 90 124 The repeated imbricate faults, shear-plan[e]s, and drag-folds. 1942 M. P. Billings Struct. Geol. xii. 221 The lineation results from the parallel arrangement of the crests of minute drag folds formed by the sliding of different layers over one another. 1965 G. J. Williams Econ. Geol. N.Z. xix. 342/2 The only folding has been in the form of drag-folds near major faults and gentle compactional folds in the lower Tertiary sediments. < as lemmas |
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