Vibracore 4V1, Kailua Bay

Uniform succession of bioturbated, muddy, very fine- to fine-grained, carbonate sand: massive appearing (no obvious sedimentary structures) owing to extensive bioturbation; yellowish to light greenish gray (5Y-GY8/1); poor to fair sorting with abundant mud (25 to 45+%); all sand clasts angular to subangular; sand fraction composed of a mix of Halimeda (18.5-23.5%), benthic foraminifera (17.0-19.5%), calcareous algae (11.0%) and coral fragments (9.0-9.5%), with common carbonate rock fragments (2.0-7.5%); and calcareous sponge spicules (4.5-5.0%); also abundant unidentifiable skeletal clasts (22.0-32.0%) owing to very fine grain size.