During this violent impact, a several-thousand-miles-deep magma ocean was created– however. In the new study, Maurice and his team designed a model that looked at the solidification of the magma ocean on the moon. They found that the magma ocean was active 150 million to 200 million years ago. They calculated how the composition of the magnesium- and iron-rich silicate minerals that formed during the solidification of the magma ocean changed over time. The team discovered a dramatic change in the lunar composition of the remaining magma ocean as solidification progressed.

Source: Daily Mail July 13, 2020 18:52 UTC