Rịba ama amaokwu a dị n'okpuru ma zaa ajụjụ ahụ mgbe e mesịrị n'otu asụsụ ahụ dị ka amaokwu ahụ:  Passage: The Mid-Atlantic Ridge (MAR) bụ ugwu dị n'etiti oke osimiri, ihe dị iche iche tectonic efere ma ọ bụ ihe owuwu efere dị n'akụkụ ala nke Oké Osimiri Atlantic, na akụkụ nke ugwu kachasị ogologo n'ụwa. N'Ebe Ugwu Atlantic, ọ na-ekewa efere Eurasia na nke Ebe Ugwu America, n'Ebe Ndịda Atlantic kwa, ọ na-ekewa efere Africa na nke Ebe Ndịda America. Ugwu ahụ na-agbasa site na nkwụsị na Gakkel Ridge (Mid-Arctic Ridge) n'ebe ugwu ọwụwa anyanwụ nke Greenland na ndịda ruo Bouvet Triple Junction na South Atlantic. Ọ bụ ezie na ihe ka ukwuu n'Ugwu Mid-Atlantic dị n'okpuru mmiri, akụkụ ya ụfọdụ dị nnọọ elu nke na ha dị n'elu oké osimiri. A maara akụkụ ugwu ahụ nke gụnyere Iceland dị ka Reykjanes Ridge. Ugwu a na-agbasa ihe dịka sentimita 2.5 kwa afọ.  Ajụjụ: Gịnị ka a na-ahụkarị n'okpuru mmiri?
Ugwu Mid-Atlantic