Plate P4. Photomicrographs illustrating volcanic and plutonic lithic fragments within the sands and sandstones of Woodlark rift. 2. Lathwork volcanic lithic fragment with intersertal chlorite and magnetite in a matrix of smectite and chlorite. Surrounding detrital grains include magnetite, felsitic, and partially devitrified colorless vitric volcanic lithic fragments (Sample 180-1118A-71R-1, 13-15 cm [878.53 mbsf]) (cross-polarized light).