Darren asked:
I'm wondering how lunar/asteroidal regolith becomes reprocessed into solid
brecciated stones. Is it reburied to a depth that heat and pressure do the job,
or maybe "cold welding" plays a role?
Rob McC responded:
Probably impact pressures from meteorites. I suppose heat during
the process may be involved ... I would imagine impact melting ...
Hello Darren, Rob, and List,
1. fragmentation, mixing, comminution by impacts
2. production of near-surface fragmental regolith
3. lithification of this regolith layer by further impacts => production of
regolith
breccias
4. further reworking, fragmentation, lithification by even more impacts
Cheers,
Bernd
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