A new way of looking at the Earth's interior
by Felix Würsten, ETH Zurich
[ethz.ch]
[phys.org]

the paper is:

Mashino, I., Murakami, M., Miyajima, N. and Petitgirard, S.,
2020. Experimental evidence for silica-enriched Earth’s lower
mantle with ferrous iron dominant bridgmanite. Proceedings
of the National Academy of Sciences, 117(45), pp.27899-27905
[www.pnas.org]

Yours,

Paul H.

"The past is never dead. It's not even past."
William Faulkner, Act 1, Scene III, Requiem for a Nun (1951)