Plate P8. Pyrofusinite and pyrite replacement of woods. 1. T5829; Hole 1115A; 272.84 mbsf. Fusinite formed by charring of woody tissues. Fusinite is generally absent from the sample suite but is dominant in two samples. In these samples, probable air-fall tuff fragments are present, but such tuff fragments are present in many samples lacking fusinite. Reflectance of secondary cell walls = 3.46%. Primary cell walls have a much lower reflectance but are too thin to measure accurately (reflected light; field width = 0.22 mm; mean vitrinite reflectance = 0.22% and 0.25% in adjacent samples).