Mean grainsize of surface samples collected from the leeward, off-reef 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. Six surface samples were taken from the leeward, off-reef area and analysed to determine mean grainsize and the sorting coefficient (expressed as the standard deviation of grainsize). Results indicate that the off-reef area has an average mean grainsize of ~1.16phi, with an average sorting coefficient of 0.89phi.威斯塔里礁（Wistari Reef）为一座泻湖型台礁，地处南回归线之上，位于大堡礁南部的摩羯-邦克群岛区。研究人员从该礁的背风侧礁外区域采集了6件表层样品，对其开展分析以测定平均粒径与分选系数（分选系数以粒径标准差表征）。分析结果显示，该礁外区域的平均粒径约为1.16φ，平均分选系数为0.89φ。