Over time the sediments get compacted and the entrapped liquid iron is squeezed out (back into the core).
(the sediments; get; compacted and the entrapped liquid iron is squeezed out (back into the core; T:Over time) (the sediments; get compacted; T:Over time) (the entrapped liquid iron; is squeezed out back; )
the sediments the sediments the entrapped liquid iron
get get compacted is squeezed out back
compacted and the entrapped liquid iron is squeezed out (back into the core T:Over time
T:Over time