Figure F11. Alternating parallel-wavy-laminated (at 33-35, 32-31.5, 29.5-31, and 29-25 cm) with ripple-laminated (at 31.8-32.8, 31-31.5, and 29-29.5 cm) fine-grained sandstone. This sandstone underlies another fine-grained sandstone with a sharp erosional contact marked by scours (interval 180-1108B-34R-4, 24-35 cm).