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For questions about the Earth's core. The center of the Earth is primarily iron-nickel.

13 votes
1 answer
1k views

How is known that the Earth core is solid?

The inner core is in the outer core, which is liquid. Thus, it is inpermeable for the transverse waves. … So, any transverse wave originating in the crust, shouldn't be able to reach the core and vice versa. How could it been measured? …
peterh's user avatar
  • 670
5 votes
1 answer
1k views

Why is uranium only in the crust, really?

As I know, uranium is currently thought that it is mainly in the crust and not in the core or in the mantle. … But, according to this answer, the solubility of Uranium in the Earth Core is between 2ppm and 6ppm. …
peterh's user avatar
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