Plate P1. Optical photomicrographs. 1. Epiclastic level with phenoclasts of embayed quartz, green hornblende, and biotite. The groundmass is composed of reworked glass shards (Sample 180-1118A-68R-3, 102-105 cm; plane-polarized light; scale bar = 0.1 mm). 2. Mud clasts with reworked planktonic foraminifer tests in fine-grained arenite (Sample 180-1118A-41R-3, 130-132 cm; plane-polarized light; scale bar = 0.5 mm). 3. Mud clasts with planktonic and benthic foraminifer tests in arenite enriched in volcaniclastic fragments. Note the abundant reworked benthic foraminifer tests (Sample 180-1108B-31R-2, 20.5-23.5 cm; plane-polarized light; scale bar = 1 mm). 4. Polygenic arenite with granite, epidote, serpentinite, and volcaniclastic materials. The cement is carbonaceous (Sample 180-1108B-3R-CC, 0-4 cm; crossed polars; scale bar = 0.5 mm). 5. Siltite and arenaceous levels with erosional structures (Sample 180-1116A-18R-2, 11-15 cm; plane-polarized light; scale bar = 1 mm). 6. Load cast textures at the contact between arenite and siltite (Sample 180-1118A-66R-5, 17-21 cm; plane-polarized light; scale bar = 0.5 mm). Bt = biotite, e = epidote,

Plate P1. Optical photomicrographs. 1. Epiclastic level with phenoclasts of embayed quartz, green hornblende, and biotite. The groundmass is composed of reworked glass shards (Sample 180-1118A-68R-3, 102-105 cm; plane-polarized light; scale bar = 0.1 mm). 2. Mud clasts with reworked planktonic foraminifer tests in fine-grained arenite (Sample 180-1118A-41R-3, 130-132 cm; plane-polarized light; scale bar = 0.5 mm). 3. Mud clasts with planktonic and benthic foraminifer tests in arenite enriched in volcaniclastic fragments. Note the abundant reworked benthic foraminifer tests (Sample 180-1108B-31R-2, 20.5-23.5 cm; plane-polarized light; scale bar = 1 mm). 4. Polygenic arenite with granite, epidote, serpentinite, and volcaniclastic materials. The cement is carbonaceous (Sample 180-1108B-3R-CC, 0-4 cm; crossed polars; scale bar = 0.5 mm). 5. Siltite and arenaceous levels with erosional structures (Sample 180-1116A-18R-2, 11-15 cm; plane-polarized light; scale bar = 1 mm). 6. Load cast textures at the contact between arenite and siltite (Sample 180-1118A-66R-5, 17-21 cm; plane-polarized light; scale bar = 0.5 mm). Bt = biotite, e = epidote, = granite, Hbl = hornblende, Qtz = quartz.