Divergent plate boundaries Volcano

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at mid-oceanic ridges, 2 tectonic plates diverge 1 new oceanic crust formed cooling , solidifying of hot molten rock. because crust thin @ these ridges due pull of tectonic plates, release of pressure leads adiabatic expansion (without transfer of heat or matter) , partial melting of mantle, causing volcanism , creating new oceanic crust. divergent plate boundaries @ bottom of oceans; therefore, volcanic activity on earth submarine, forming new seafloor. black smokers (also known deep sea vents) evidence of kind of volcanic activity. mid-oceanic ridge above sea-level, volcanic islands formed; example, iceland.







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