外地核
- 网络outer core
外地核-
Fe-O-S高压声速测量及外地核组分的限定性研究
The Sound Velocity Measurements of Fe-O-S at High Pressure and the Candidate Compositions Research of Earth 's Outer Core
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有证据表明，外地核的密度约为地幔物质的两倍。
Evidence indicates that the outer core is about twice as dense as the material in the mantle .
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因此，眼球构造可能是外地核向地幔释放氧，下地幔内存在氧元素的历史记录。
The eyeball structures might have recorded the history of oxygen activity in the mantle and the Earth 's core .
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有人认为外地核主要是由在高温下处于熔态的铁和镍构成的。
The outer core is believed to be composed mostly of iron and nickel in a molten state at a very high temperature .