Plate P3. Vitrinite showing fluorescence from cell walls. 1. T5809; Hole 1109D; 387.86 mbsf. Longitudinal section of wood preserved as telovitrinite. The cell lumens are mostly filled with humic material, but the degree of compressions is small and some parts of the lumens are open. Cell walls are much lower in reflectance and are strongly fluorescing. Their reflectances are within the range normally associated with liptinite, but they do not represent suberinite. Reflectances of the cell walls are lower in the lower part of the field, but the cell contents have relatively consistent reflectances across the various tissue types (reflected light; field width = 0.22 mm; vitrinite reflectance [cell contents] = 0.37%, [cell walls] = 0.12%).