The lunar mare radioactively date back to 4.6 billion years, at the origin of the Moon, hencetheir dark color due to this aging.

Name: The lunar mare radioactively date back to 4.6 billion years, at the origin of the Moon, hencetheir dark color due to this aging.
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Question

Quizplus · Accepted Answer

The lunar mare are geologically younger than the highlands, dating back to about 3.1 to 3.8 billion years, and their dark color is due to the basaltic lava that filled the basins, not aging.

The Lunar Mare Radioactively Date Back to 4