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Shallow Slope
Surveyor Crater is relatively old. When it was young, it had a
raised rim 6 - 7 meters high; but that has long since been worn
down by a relentless, slow rain of small impactors. When it was
young, Surveyor Crater was about 35 meters deep; but the interior has
been long been filling with ejecta from impacts near and far. It
is now only about 15 meters deep. Where once the interior slope
was 20 - 25 degrees, they are now about 9 - 10 degrees.
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