单词 | neptunian dyke |
释义 | > as lemmasneptunian dyke neptunian dyke n. Geology a deposit of sand or other clastic rock cutting through sedimentary strata in the manner of an igneous dyke, formed by the filling of an undersea fissure; also called neptunic dyke. ΚΠ 1948 Geol. Mag. 85 276 During the Easter Field Meeting of the Sedgwick Club, portions of the Neptunian dyke at Hazler Hill..were collected and brought back to Cambridge for further examination. 1974 Nature 29 Nov. 376/1 Other features at and just below this weathered surface include neptunian dykes. 1991 R. Goldring Fossils in Field viii. 170 Neptunian dykes can be large or very thin and may pass into bedding parallel ‘sills’. < as lemmas |
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