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TeachMeFinance.com - explain Oceanic Volcanoes Oceanic Volcanoes The term 'Oceanic Volcanoes' as it applies to the area of volcanos can be defined as ' In a typical 'oceanic' environment, volcanoes are alined along the crest of a broad ridge that marks an active fracture system in the oceanic crust. Basaltic magmas, generated in the upper mantle beneath the ridge, rise along fractures through the basaltic layer. Because the granitic crustal layer is absent, the magmas are not appreciably modified or changed in composition and they erupt on the surface to form basaltic volcanoes'. Previous 5 Terms: Ocean energy systems Ocean freight differential (under P.L. 480) ocean mixing Ocean ranching Ocean thermal energy conversion (OTEC) Next 5 Terms: oceanography oceanography oceanology OCFNT ochlophobia About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.