[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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