The oceanic plate is made of denser and heavier rock, so it begins to sink down under the continental plate and into the mantle.

海洋板块是由密度更大、更重的岩石构成的，所以它开始下沉到大陆板块之下，到地幔之中。

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They mainly formed at tectonic environment of the middle ridge of the oceanic plate, partial are the products of island arc and oceanic islands.

主要形成于大洋板块洋中脊构造环境，部分为岛弧一洋岛环境下的产物。

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The Nanling metallogenic belt is the result of the combination of the Pacific plate and the Indian oceanic plate with the continental plate of China.

南岭成矿带是太平洋及印度洋板块对中国大陆板块联合作用的结果。

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Although they are sometimes produced by landslides on the seafloor, significant tsunamis are typically created by subduction earthquakes, when one massive oceanic plate suddenly lurches deeper beneath another plate, shoving up a huge section of the seafloor.

MSN: Why this Indonesia quake didn't spark a monster tsunami

Instead of occurring at a plate boundary along an area called a subduction zone, where one tectonic plate is diving beneath another, this earthquake occurred in the middle of an oceanic plate, where the faults in the crust essentially moved from side to side instead of up and down.

MSN: Why this Indonesia quake didn't spark a monster tsunami