Figure F11. Highly weathered regolith of variegated colors at the base of Unit VI, which overlies the top of volcanic basement. A. Claystone containing large red-colored pebbles of weathered basalt plus coarse sand and granules (interval 183-1138A-73R-3, 122-150 cm). B. Brecciated material in regolith (interval 183-1138A-73R-CC, 0-15 cm).