Plate P2. Photomicrographs illustrating mineral grains present within the sands and sandstones of Woodlark rift. 1. Limonite/goethite concretion surrounded by chloritized volcanic fragments, detrital feldspar, and clinopyroxene grains. (Sample 180-1109D 44R-1, 6-8 cm [753 mbsf]) (plane-polarized light).