How long does DNA last in rocks?

Paul paul at
Mon Sep 8 14:52:13 EST 2003

Hi all,

I (a geneticist by training) was having a debate with my local barman
(currently in his 4th year in geology) as to how long DNA remains in

Is there any concrete (no pun intended!) information on this anywhere as
to how long DNA retains its structure in rock/fossils?

Any info. as to the half-life appreciated, as would be any rants, raves,
URL's references or whatever!





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