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Large Igneous Province




Many scientists argue that LIPs form as the result of Mantle Plume s that have only just arrived at the surface of the Earth. When a plume first arrives, they argue, the excess heat and chemical differences lead to an extended period of volcanism. Only subsequently does the plume cool and produce the kind of narrow channel of volcanism associated with features like the Hawaiian Islands . However, other scientists argue that large igneous provinces result from rifting and in particular the pulling apart of newly formed continental rifts without the need for deep seated plumes. Potentially both theories may lead to LIP formation.

Because, in several cases, a LIP may have occurred simultaneously with Oceanic Anoxic Event s and Extinction Event s, it has been proposed that the volcanic byproducts of LIP formation may have had a profound and deleterious effect on the global environment.


SEVERAL EXAMPLES OF LIPS




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