Vibracore 1V1, Kailua Bay

Upward-fining, brownish-gray (5YR4/1), silty, very fine-grained carbonate sand layer (6-8) cm thick; vague lamination to burrowed?; burrowed lower contact.

Variable upward-coarsening and fining, burrowed to bioturbated, medium- to coarse- and very coarse-grained, coraline algal-rich carbonate sand; massive appearing owing to extensive bioturbation; variable color from light olive gray (5Y8/1) in lower part to grayish orange (10YR7/4) in upper meter; fair to moderate sorting; clasts subrounded to rounded; sand composed mainly of calcareous algal fragments (51.0-55.0%) and coral fragments (16.0-17.0%), with common carbonate rock fragment grains (8.5-13.5%) and Halimeda fragments (12.5-16.5%).

Irregular, bioturbated, very fine- to fine-grained, carbonate sand; yellowish to light greenish gray (5Y-GY8/1); fair to moderate sorting; clasts angular to subangular; sand composition mix of fragments of Halimeda (27.5%), coral (20.5%), calcareous algae (17.5%) and benthic foraminifers (9.5%); minor calcareous sponge spicules (4.5%); relatively abundant unidentifiable grains owing to fine grain size.