Grainsize of surface samples collected from the Reef rim physiographic zone of Wistari Reef

Wistari Reef is a lagoonal platform reef, situated on the Tropic of Capricorn, within the Capricorn and Bunker region of the southern Great Barrier Reef. Three surface samples were taken from the lagoon area and analysed to determine mean grainsize and the sorting coefficient (expressed as the standard deviation of grainsize) within each sample. The sediments of the reef edge vary greatly in grainsize and sorting; ranging from moderately well-sorted to poorly sorted coarse sand. The only sediments seen here exist in protected pools and other slightly lower energy environments. Very coarse sediments are common.