Plate P2. Photomicrographs illustrating mineral and lithic grains from sands at Sites 1175 and 1176, Leg 190, Nankai Trough trench wedge to slope transition. 1. Quartzose sand with quartz, sedimentary rock fragments and chert (Sample 190-1176A-48X-CC, 14-17 cm [440.15 mbsf]) (cross-polarized light). 2. Red radiolarian chert fragment with thin quartz veins (Sample 190-1176A-46X-CC, 19-23 cm [421 mbsf]) (plane-polarized light). 3. Polygonal quartz grain with undulose extinction (Sample 190-1176A-46X-CC, 19-23 cm [421 mbsf]) (cross-polarized light). 4. Radiolarian chert fragment containing quartz veins (Sample 190-1176A-46X-CC, 19-23 cm [421 mbsf]) (cross-polarized light). 5. Metamorphic rock fragment with aligned quartz and muscovite (Sample 190-1176A-32X-CC, 7-9 cm [286.17 mbsf]) (cross-polarized light). 6. Silicic tuffaceous fragment with relict shards in groundmass (Sample 190-1175A-37X-4, 30-32 cm [344.8 mbsf]) (plane-polarized light).

Plate P2. Photomicrographs illustrating mineral and lithic grains from sands at Sites 1175 and 1176, Leg 190, Nankai Trough trench wedge to slope transition. 1. Quartzose sand with quartz, sedimentary rock fragments and chert (Sample 190-1176A-48X-CC, 14-17 cm [440.15 mbsf]) (cross-polarized light). 2. Red radiolarian chert fragment with thin quartz veins (Sample 190-1176A-46X-CC, 19-23 cm [421 mbsf]) (plane-polarized light). 3. Polygonal quartz grain with undulose extinction (Sample 190-1176A-46X-CC, 19-23 cm [421 mbsf]) (cross-polarized light). 4. Radiolarian chert fragment containing quartz veins (Sample 190-1176A-46X-CC, 19-23 cm [421 mbsf]) (cross-polarized light). 5. Metamorphic rock fragment with aligned quartz and muscovite (Sample 190-1176A-32X-CC, 7-9 cm [286.17 mbsf]) (cross-polarized light). 6. Silicic tuffaceous fragment with relict shards in groundmass (Sample 190-1175A-37X-4, 30-32 cm [344.8 mbsf]) (plane-polarized light).