Scientists have dated the moon's oldest, and largest, impact site

[Admin]

The moon has been bombarded by asteroids and comets for more than 4.32 billion years.

Scientists have dated the moon's oldest, and largest, impact site : Read more

 

[Unclear Engineer]

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The previous estimates for the period of intense bombardment is 4.2-to-3.8 billion years ago, and this article says that finding a meteorite on Earth that dates to 4.32 to 4.33 billion years ago changes that in some substantial way? What's 120 million years to a theory with no local samples for verification?

And, exactly how does the theory go with respect to how the ratio of lead to uranium was "frozen" into that meteorite? Was it when the big meteor hit the Moon, or when another, smaller crater was created and ejected a piece of the larger impact remnant?

For that matter, how are they sure the meteorite found on Earth even came from that location on the Moon.