Figure F24. Digital photomicrograph (crossed nicols) of a mixed coarse-grained sandstone with abundant large benthic and rare smaller planktonic foraminifers tests, coral fragments, red algae, and subrounded fragments of basalt and andesite. Rare detrital grains of clinopyroxene and feldspar (interval 180-1115C-35R-1, 85-88 cm).