Re: [meteorite-list] How does regolith get stoned?

[Randy Korotev]

Shock compression.  The shock wave from an impact compresses the "powder."  Where grains touch, the pressure can be very high.  There may also be a little sintering or whole-scale melting in some regolith breccias, but it doesn't really require heat to make a regolith breccia.  An aspirin tablet is just compressed powder.

Randy Korotev



At 20:27 26-08-06 Saturday, you wrote:

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?

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