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現行犯:科学者たちが海底の誕生を目撃

Caught in the Act: Scientists Witness the Ocean Floor Being Born

インド洋の海底で、プレートが割れて溶岩が噴き出す瞬間が史上初めて直接観測されました。谷底は4メートル沈み、16日間も溶岩が流出。新たな海底が生まれる仕組みに迫ります。
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The sea floor may look quiet, but it can change fast. Deep under the ocean, Earth’s plates pull apart. A plate is a huge piece of Earth’s hard outer shell. When plates open, hot rock rises up. Magma means hot rock under Earth. Lava is magma after it comes out. Scientists have now watched this happen directly for the first time. (nature.com)

In the Indian Ocean, tools were already waiting on the sea floor. They recorded earthquakes, ground movement, and heat. Then the bottom split open. The valley floor dropped about four meters. The two sides moved apart by more than one meter. Lava poured out for about sixteen days. (nature.com)

The big surprise was this: much of the movement was quiet. It did not come only from strong earthquakes. Magma pushed the hard rock and helped make new sea floor. This helps scientists understand how our planet builds the ocean bottom. (nature.com)

by EigoBoxAI
作成:2026/07/10 18:02
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