Plate P3.
Vitrinite showing fluorescence from cell walls. 3. T5809; Hole
1109D; 387.86 mbsf. Oblique section of wood preserved as telovitrinite. The cell
lumens are partially filled with humic material, but open lumens are still
present and little compaction has occurred. Cell walls are much lower in
reflectance and are most easily seen in fluorescence mode. The vertical cells
represent a medullary ray structure (reflected light; field width = 0.22 mm;
vitrinite reflectance [cell contents] = 0.34%).