| 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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