English oceanic spreading center English Mid-ocean ridge English underwater mountain range English English mid-ocean ridge mid-ocean ridges English English English oceanic spreading center Mid-Ocean Ridges mid-ocean ridge English mid ocean ridge mid-ocean ridge English English English oceanic spreading center English English English English English Mid-ocean ridge http://en.wikipedia.org/wiki/Mid-ocean_ridge mid-ocean ridge oceanic spreading center English English occurs on mid-ocean ridges oceanic spreading center oceanic spreading center English oceanic spreading center English mid-ocean ridge English English English English oceanic spreading center oceanic spreading center English English English English English mid-ocean ridges English oceanic spreading center Mid-ocean ridge oceanic spreading center occurs on mid-ocean ridges mid-ocean ridges English mid-ocean ridges English mid-ocean ridges English English English English English mid-ocean ridge English http://en.wikipedia.org/wiki/Mid-ocean_ridge English not very clear on the point English Mid-ocean ridge the minerals are under the middle of the oceans mid-ocean ridge-Wikipedia Mid-ocean ridge mid-ocean ridge http://en.wikipedia.org/wiki/Mid-ocean_ridge English English Mid ocean ridges oceanic spreading center Mid ocean ridges English oceanic spreading center English view article English English English English the minerals are under the middle of the oceans English English oceanic spreading center English English mid-ocean ridge English English oceanic spreading center oceanic spreading center English English oceanic spreading center English English English mid-ocean ridges English English English Mid-ocean ridge English English English English http://en.wikipedia.org/wiki/Mid-ocean_ridge oceanic spreading center ridges English English English English oceanic ridge English English English English English English English English oceanic spreading center English English English mid-ocean ridge English mid-ocean ridges oceanic spreading center English English oceanic spreading center ridges English English English mid-ocean ridges mid-ocean volcanic ridges oceanic spreading center English