The debris from the collision coalesced and cooled, but radioactive elements deep in the interior heated up the rock beneath the crust, and 500 million years later, volcanic lava slurped into impact craters on the moon to form the so-called "seas" or maria.
ການ debris ຈາກ collision coalesced ແລະເຢັນ, ແຕ່ອົງປະກອບ radioactive ເລິກຢູ່ໃນພາຍໃນຮ້ອນສູງເຖິງ rock ລຸ່ມນີ້ crust ໄດ້, ແລະ 500 ລ້ານປີຕໍ່ມາ, lava volcanic slurped ເຂົ້າໄປໃນ craters ຜົນກະທົບຕໍ່ວົງເດືອນໃນການປະກອບອັນທີ່ເອີ້ນວ່າ "ທະເລ" ຫຼື maria.