Dear All, I am a new subscriber to this list (ISOGEOCHEM) and I'm proud to be on it. Just a quick run-down on me and my research. I conduct carbon, nitrogen and oxygen isotope research on collagen, keratin, carbonate hydroxylapatite, amino acids, cellulose and elemental carbon. At first I began on fossilised materials, but alas, funding has diminished greatly here (and everywhere else for that matter) so I have resorted to modern animals and environmental geochemistry. Anyway. Regarding my subject heading. I have just conducted some research on fossil leaves between 135 million years old to 100 million years old. What are your thoughts on diagenesis of plant material, especially carbon isotopes? Also, does anyone out there investigate such a topic and would be willing to discuss there work? Ciao Darren **************************************** Darren R. Gröcke Palaeobotany Research Centre Department of Botany The University of Adelaide South Australia 5005 AUSTRALIA Ph: +61 8 8303 3120 Fax: +61 8 8232 3297 ****************************************