Vibracore 12V1, Kailua Bay

Uniform to upward coarsening succession of bioturbated, muddy, very fine- to fine-grained, Halimeda/foraminifera carbonate sand: massive appearing (no obvious sedimentary structures) owing probably to extensive bioturbation; yellowish to light olive gray (5Y-8/1-6/1) and light greenish gray (5GY8/1); very poor sorting with abundant mud (12 to 15%) and 2-5% scattered skeletal fragments in the coarse to very coarse sand size; sand size clasts angular to subangular; sand fraction dominantly Halimeda (26.5-29.0%), foraminifera (15.5-16.5%) and calcareous algae (13.5-17.0%) and minor coral fragments (1.5-5.0%), echinoid fragments (1.5-4.5%) and calcareous sponge spicules (2.5-3.5%); abundant unidentifiable skeletal clasts (24.0-25.5%); owing to the very fine grain size (most probably coral fragments).