Plate P4. Photomicrographs illustrating volcanic and plutonic lithic fragments within the sands and sandstones of Woodlark rift. 6. Detrital grain composed of intergrown feldspar, biotite, and hornblende (granitic fragment) surrounded by lathwork and microlitic volcanic lithic and feldspar detrital grains in calcite-cemented coarse-grained lithic sandstone (Sample 180-1108B-3R-CC, 0-4 cm [14.50 mbsf]) (cross-polarized light).