中脊，通常是指叶痕下方或上、下正中的微凸纵脊，有时为横纹切断。
大西洋洋中脊 Mid-Atlantic Ridge
洋中脊 mid oceanic ridge ; [海洋] Mid-ocean ridge ; ocean ridge ; oceanic ridge
大西洋中脊 [海洋] mid-Atlantic ridge
大洋中脊 [海洋] mid-oceanic ridge ; oceanic ridge ; [海洋] mid-ocean ridge ; mid ocean ridge
洋中脊玄武岩 MORB ; [海洋] [岩] mid-ocean ridge basalt
大洋中脊玄武岩 MORB ; mid-ocean ridge basalt
印度洋中脊 [海洋] Central Indian Ridge ; Mid-Indian Ridge ; Central Indian Ocean ridge
富卡洋中脊 Juan de Fuca Ridge
西南印度洋中脊 SWIR
很难看出这个理论如何适用于大西洋中脊和印度洋脊之间的板块。
It is difficult to see how the theory applies to the plate between the Mid-Atlantic Ridge and the ridge in the Indian Ocean.
其结果便是：沿着大洋中脊形成了海底山脉和山丘。
The result: underwater mountains and hills all along the axis of the mid-ocean ridge.
洋中脊，也叫扩展中心，出现在两个板块相互分离的地方。
Ridges, also called spreading centers, occur where two plates are moving away from each other.
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