Plate P1. Photomicrographs illustrating mineral and lithic grains from sands at Site 1174, Leg 190, Nankai Trough trench wedge. 1. Mafic to intermediate volcanic rock fragments with microphenocrysts of plagioclase and pyroxene in a brown-black glassy groundmass (Sample 190-1174B-9R-2, 108-112 cm [220.3 mbsf]) (plane-polarized light). 2. Plagioclase phenocryst with glassy inclusions in a mafic to intermediate volcanic rock fragment (Sample 190-1174B-1R-1, 6-10 cm [143.8 mbsf]) (plane-polarized light). 3. Fine-grained sedimentary rock fragment (Sample 190-1174B-1R-1, 6-10 cm [143.8 mbsf]) (plane-polarized light). 4. Slate fragment (Sample 190-1174B-9R-2, 108-112 cm [220.3 mbsf]) (cross-polarized light). 5. Chert fragment with quartz veins (Sample 190-1174B-1R-1, 6-10 cm [143.8 mbsf]) (cross-polarized light). 6. Silicic volcanic fragment with microphenocryts of quartz and feldspar (Sample 190-1174B-1R-1, 6-10 cm [143.8 mbsf]) (cross-polarized light).

Plate P1. Photomicrographs illustrating mineral and lithic grains from sands at Site 1174, Leg 190, Nankai Trough trench wedge. 1. Mafic to intermediate volcanic rock fragments with microphenocrysts of plagioclase and pyroxene in a brown-black glassy groundmass (Sample 190-1174B-9R-2, 108-112 cm [220.3 mbsf]) (plane-polarized light). 2. Plagioclase phenocryst with glassy inclusions in a mafic to intermediate volcanic rock fragment (Sample 190-1174B-1R-1, 6-10 cm [143.8 mbsf]) (plane-polarized light). 3. Fine-grained sedimentary rock fragment (Sample 190-1174B-1R-1, 6-10 cm [143.8 mbsf]) (plane-polarized light). 4. Slate fragment (Sample 190-1174B-9R-2, 108-112 cm [220.3 mbsf]) (cross-polarized light). 5. Chert fragment with quartz veins (Sample 190-1174B-1R-1, 6-10 cm [143.8 mbsf]) (cross-polarized light). 6. Silicic volcanic fragment with microphenocryts of quartz and feldspar (Sample 190-1174B-1R-1, 6-10 cm [143.8 mbsf]) (cross-polarized light).