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User:Mamayuco/sandboxa

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Propose moving 30+ categories with similar names:

‎*Category:Archean igneous petrology to Category:Archean magmatism

‎The rationales is that "igneous petrology" is inadequate and magmatism both more precise and clear. These categories group two types of article: 1) articles about volcanism and volcanic rocks and 2) articles about intrusions. Both of these kind of rocks and phenomenta are derived from the artivitiy of molten rock under earth's surface, that is magma. Igneous and magmatic rocks are the same, but petrology refers to a science. By analogy do we talk about concise Category:Freshwater molluscs or about Category:Freshwater malacology?

A secondary reason is that igneous petrology sounds extraneous to those unfamiliar with geology while magmatism is easier to grasp.