Vibracore 31V1, north coast

Massive-appearing (bioturbated), pebbly, medium- to very coarse-grained, algal/coral/foraminiferal carbonate sand: grayish orange (10YR7/4); very poor sorting; sand and pebble size clasts rounded to well rounded; composed mainly of a mix of calcareous algae (47.5%), coral fragments (15.5%) and foraminifera (11.0%); common carbonate rock fragments (8.5%) and mollusks (11.0%). Uniform succession of vaguely-laminated to bioturbated, fine- to coarse-grained, coral/algal/foraminiferal carbonate sand: massive appearing owing to extensive bioturbation; light olive gray (5Y6/1); moderate sorting; common large (2.5-5.0 cm), disarticulated and fragmented pecten bivalves (Chlamys sp.), some oriented subparallel to bedding; sand size clasts angular to rounded; composed mainly of a mix of coral fragments (38.5%), calcareous algae (28.5%) and foraminifera (16.0%); common carbonate rock fragments (6.0%), minor echinoid fragments (3.0%), mollusks (2.0%) and Halimeda (2.0%).