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单词 neptunian dyke
释义

neptunian dyke

noun Geology
A deposit of sand cutting through sedimentary strata in the manner of an igneous dyke, formed by the filling of an underwater fissure.Therefore we correlate the ash-fall episode recorded at Katraboca with that represented by the tuff filling the neptunian dyke of Liter....
  • The sample was collected from the redeposited tuff filling a neptunian dyke in the SW wall of the Liter quarry.
  • A neptunian dyke is a sheet of sediment or sedimentary rock, usually vertical or subvertical, which cuts across any other rock type and, at first glance, resembles an igneous dyke.
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更新时间:2024/9/22 3:51:47