
Neptunism is a superseded scientific theory of geology proposed by Abraham Gottlob Werner in the late 18th century that proposed rocks formed from the crystallisation of minerals in the early Earth`s oceans. It was named after Neptune, the ancient Roman god of the sea. There was considerable debate between its proponents and those favouring a riv....
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http://en.wikipedia.org/wiki/Neptunism

(from the article `Earth sciences`) The two major theories of the 18th century were the Neptunian and the Plutonian. The Neptunists, led by Werner and his students, maintained that the ... ...and deposition during the retreat of this ocean from the land (his two `Partial,` or disintegrated, rock series). Werner`s interpretatio...
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http://www.britannica.com/eb/a-z/n/26
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