What are the lunar maria composed of and how did they form?

1 Answer
Mar 13, 2016

Answer:

Lunar maria are actually pools of once-molten rock. They were formed while the Moon was still solidifying, when meteors impacting the Moon broke through its thin crust.

Explanation:

The maria actually were seas at one time.

When the Moon first formed, it was hot enough for the surface to be covered by a great ocean of molten rock. As this solidified, on occasion large meteors would hit the Moon and crack the thin, still-forming crust. Then molten rock came to the surface once more, becoming the maria we see today.

Read more anout the Moon and how its features came to be here:

http://astronomy.nmsu.edu/tharriso/ast105/Ast105week06.html