SAMPLE PREP./SIZE PYROL. CONDITIONS TOTAL ION COUNTS
FOSSIL CONIFER WOOD (Upper Cretaceous)
silicification phase: Opal CT
Aix-en-Province, France; obtained from the Inst. Botanique et Palaeobotanique, Fac. des Sciences, Univ. Paris suspension in methanol; 50 yg standard
REMARKS - This much older specimen of silicified wood shows a dominant (alkyl)-phenol pattern. The absence of more complex lignin-derived fragments, e.g. methoxyphenols, appears to indicate much higher degrees of chemical transformation. Also note relatively low signals for sulphur-containing ions.
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