What I have noticed about these debates...

AC- I'm afraid you are mistaken. DNA can survive relatively intact for at least 20 million years if the right conditions exist. An example being the Clarkia Lake Beds in Idaho where leaves from plants such as the genus Metaseqouia can be found with their colors still looking as fresh as if they fell today. Of course this lasts for only a few minutes before they turn black from oxidation. The REAL exciting point is that DNA from the chloroplasts has been extracted and sequenced in two of the genera, Magnolia and Taxoduim. A small percentage of leaves tested held DNA from nuclei as well.
Makes me quiver just thinking about it from: Gould, Stephen "Magnolias from Moscow", Dinosaur in a Haystack. Crown Trade Paperbacks, 1995. pp403-410.further reference Goldberg, E.M., et al. "Chloroplast DNA sequence from a Miocene Magnolia species" Nature, April 12, 1990.