根据前文The temperature of the inner core can be as high as 5,400℃.可知,此处指的是地球最深处的部分,用deepest。 33. 句意:外核是液态的。它主要由铁组成,几乎和内核一样热。almost意为“几乎”,符合句意。 34. 句意:它大约有290万公里厚,是地球最厚的部分。million意为“百万”,符合句意。
There is no question that the earth’s crust originated from the mantle; the process of differentiation of the mantle is still continuing today. There is a hypothesis that the core of the earth is also growing at the expense of the mantle. Processes in the earth’s crust and mantle are ...
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R Boehler. Annual Review of Earth and Planetary Sciences . 1996Boehler, R. (1996) Melting temperature of the Earth's mantle and core: Earth's thermal structure. Annual Review of Earth and Planetary Sciences, 24, 15A40.Boehler, R., 1996, Melting temperature of the Earth's mantle and ...
Is the mantle the largest layer of the Earth? What is the Earth's average surface temperature? In what layer of the Earth's interior do primary waves travel the fastest? What is the layer that surrounds the radiation zone of the sun?
What is the temperature of the Earth's lithosphere? Lithosphere: Earth's outermost layer including the outermost mantle and the crust is called the lithosphere. The lithosphere is not continuous but made up of many large pieces of solid rocks, called plates, floating on the upper mantle. .The...
The inner core is the most dense layer of the Earth. It is a solid, iron-rich sphere located at the center of the Earth. The immense pressure at the core causes the iron to be in a solid state, despite its high temperature. The inner core is believed to have a density of about 13...
Therefore, these two lines of evidence represent a strong argument in favor of anhydrous and, hence, high-temperature origin for the Komati and Weltevreden komatiite lavas. The thermal history of a planet’s mantle is fundamental to its tectonic evolution; it determines the fate of the planet ...
Growing seismic data sets and advances in analysis techniques show that the topography of these discontinuities mainly reflects variations in mantle temperature and, hence, present-day mantle flow. However, the discordant behaviour of the 410 km and 660 km discontinuities shows that the thermal ...