Definition of neptunian dike in English:

neptunian dike

Syllabification: nep·tu·ni·an dike

noun

Geology
  • A deposit of sand cutting through sedimentary strata in the manner of an igneous dike, formed by the filling of an underwater fissure.
    More example sentences
    • 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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a powerful whirlpool in the sea