mid-ocean

Seamounts, underwater volcanoes, Rift Valley, the mid-ocean ridge, constitute a rich world of the ocean floor.

海底山脉 、 海底火山 、 裂谷 、 大洋中脊等等, 构成了丰富的海底世界.

Based on more geochemical signatures, two types of basalt are recognized, namely, ocean island basalt ( OIB) and mid ocean ridge basalt ( MORB).

进一步的地球化学研究表明，这套玄武岩为洋岛型玄武岩（OIB）和洋中脊型玄武岩（MORB）的组合。

A mid-ocean ridge a boundary between plates where new lithospheric material is injected from below s.

一道中海脊是板块之间的边界,在那里新的岩石圈的物质从下部注入.

Calcium carbonate dissolution belt and its character in the mid Pacific Ocean Basin

中太平洋海盆碳酸钙溶解带及其特征

The sea floor is spreading away from the mid-ocean ridges.

海底正在从大洋中脊扩张开来.