oceanic crust

音標(biāo)發(fā)音

But geophysicists had thought that great subduction-zone earthquakes happened only where younger oceanic crust scrapes its way into the mantle.
但是在此之前，地球物理學(xué)者們認(rèn)為，這種俯沖帶大地震僅僅在年輕的海洋地殼擠入地幔處才可能發(fā)生。
The hypothesis was substantiated soon afterward by the discovery that periodic reversals of the Earth’s magnetic field are recorded in the oceanic crust.
這個(gè)假定不久之后為發(fā)現(xiàn)所證實(shí)。該發(fā)現(xiàn)表明地球磁場(chǎng)周期性的逆轉(zhuǎn)被記錄在海洋地殼中。
By 2011 scientists aboard a Japanese deep-sea drilling ship called Chikyu hope to start drilling through a thin piece of oceanic crust to reach Earth's mantle.
2011年，科學(xué)家們將登上日本一艘名為“地球號(hào)”的深海鉆井船，他們希望通過(guò)鉆開(kāi)一塊薄的大洋地殼到達(dá)地幔。

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.
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the part of the outer rocky layer of the earth that is under the oceans and is thinner than the layer under the land