On Fri, 15 Oct 2010 09:01:27 -0700 (PDT), you wrote: >Do we have to keep an open mind to the possibility of finding a "clay meteorite"? Yep. http://www.google.com/search?num=100&hl=en&safe=off&biw=800&bih=490&q=%22carbonaceous+chondrites%22+clay&aq=f&aqi=&aql=&oq=&gs_rfai=