Definition of Neptunism in English:

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Pronunciation: /ˈnept(y)o͞oˌnizəm/


Geology , historical
The erroneous theory that rocks such as granite were formed by crystallization from the waters of a primeval ocean. The chief advocate of this theory was Abraham Gottlob Werner (1749–1817). Compare with plutonism.
Example sentences
  • As the science of mineralogy progressed, it became clear that Neptunism was flawed.
  • An enthusiastic fossil digger, he was influenced by his friend James Hutton, though he accepted elements of both Neptunism and Vulcanism.
  • C. is noted for the development of the concept of Neptunism.



noun& adjective
Example sentences
  • These developments led to the eventual rise of the Neptunist school, which advocated precipitation from a primeval ocean to produce the ancient crystalline rocks.
  • Through careful scientific observation, Hutton realised that the Neptunist view could not be true.
  • In its most extreme form, the Neptunists said that all rocks - even granites - are produced from the sea.

For editors and proofreaders

Syllabification: Nep·tun·ism

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