See
http://eminfo.vmicrobial.info/em-origins-etc-space-1.html. More
specifically, "microbiologists on the EMRO staff have been able, in a
series of repeated and tightly-designed studies, to mix these
phototrophic organisms with ceramic powder and fire it (also known as
calcining) at 1,200 C for over an hour, and have been able in each
such test to successfully culture the phototrophic organisms from the
post-firing ceramic powder."
What is the minimum temperature that will decompose DNA in a
nonreactive environment? Would high pressure, as might, for all I
know, develop in sintered ceramics, have much influence?