What does "neptunian" mean?

Neptunian: (Geol.) Formed by water or aqueous solution; as, Neptunian rocks. Neptunian races (Ethnol.), the Malay and Polynesian races. -- Neptunian theory (Geol.), the theory of Werner, which referred the formation of all rocks and strata to the agency of water; -- opposed to the Plutonic theory.

Additional senses

  1. 2.One who adopts the neptunian theory.

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