Quote:
Originally Posted by GeoffMc
Here's an example: Fracastorius (imaged at MSATT). It has a long and complicated history with the Nectaris basin and later mare flooding. Happy to discuss this kind of thing with others if there's any interest.
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Here's a thing: Why does Fracastorius and other partially ruined/flooded craters appear as half moons (excuse the pun)? Is this because,
a. The lava has cooled too much by the time it reaches one end of a crater?
b. Such craters have a "downhill" end?
c. The curvature of the moon?
d. None/All of the above?