[meteorite-list] what is the most primitve meteorite?

[Alexander Seidel]

Has any SEMARKONA [Indian fall of 1940, type LL3.0 (S2)] ever been distributed to private collectors??? I very much doubt so. One of 
the "next best" primitive meteorites from Jeff´s first category,
which has surely arrived at the collector´s scene, is the KRYMKA
meteorite [Ukrainian fall of 1946, LL3.1 (S3)].

Yep, got my piece of this wonderful, pristine meteorite. :-)
Alex
Berlin/Germany
 
> 1) It means that the meteorite was relatively unaffected by secondary 
> processes that occurred on asteroids, including thermal metamorphism, 
> melting, shock effects, and aqueous alteration.  These meteorites are 
> the chondrites whose chondrules, CAIs, matrix, and presolar grains 
> are in the most pristine condition.  In this sense, the most 
> primitive ordinary chondrite is Semarkona. There are several very 
> primitive carbonaceous chondrites, including Acfer 094,  Adelaide, 
> ALHA 77307, and a few CR chondrites.  Most of the meteorites people 
> have mentioned in this thread are not particularly primitive by this 
> definition.