It is only at the very centre of the Earth, where pressure and temperature rise even higher, that the liquid iron solidifies. (sciencedaily.com)
(Illustrated: Crater Lake By David Clarkson) The exhibition ranges from early engravings, showing imagined cross-sections of the fiery centre of the earth, to an explosive series of paintings by Joseph Wright, J M W Turner -LSB-...] (artlyst.com)
This comes across, for example, in the book's attempt to locate the physical place where hell must be and its conclusion that it must be at the centre of the earth. (faith.org.uk)