When Were Most of the Existing Lava Plains Formed on the Surface

question 76

Multiple Choice

When were most of the existing lava plains formed on the surface of Mercury?

• A) never since there is no evidence of lava flows on the surface of Mercury
• B) when Mercury was first formed, about 4.5 billion years ago
• C) at the end of the era of heavy bombardment, about 3.8 billion years ago
• D) when the crust wrinkled to form the scarps

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