| 单词 | reef knoll |
| 释义 | > as lemmasreef knoll reef knoll n. Geomorphology a hillock, generally of limestone, formed from ancient coral. ΘΚΠ the world > the earth > land > landscape > high land > rising ground or eminence > [noun] > hillock > type of sheeling-hill1597 parley hill1641 parle hill1664 risbank1665 cradle-heap1830 cradle-hill1855 reef knoll1890 cradle-knoll1897 sheeling-mound1911 1890 R. H. Tiddeman in Rep. Brit. Assoc. Advancem. Sci. 1889 602 At the foot of these mounds, or reef-knolls as I would call them, we have in many places a breccia formed of fragments of the limestone. 1969 G. M. Bennison & A. E. Wright Geol. Hist. Brit. Isles ix. 211 Extensive sheet reefs, not necessarily primarily organic in origin, as well as reef-knolls are widespread, the reef-knolls occurring on the flanks of massifs. 1988 Caves & Caving Summer 21/1 The Mid-Craven Fault runs just to the north of Malham village, giving rise to a series of reef knolls at Town Head, Cawden and Wedber. < as lemmas |
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