科学与环境
Ancient rocks reveal when Earth's tectonic engine 'switched on'
来源: Phys.org - latest science and technology news stories · 发布于
Scientists have identified a major turning point in Earth's geological history, when the processes shaping the planet's crust changed dramatically and began to resemble the plate tectonics we see today—about 2.5 billion years ago.
Scientists have identified a major turning point in Earth's geological history, when the processes shaping the planet's crust changed dramatically and began to resemble the plate tectonics we see today—about 2.5 billion years ago.
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