昆山白莲湖牡蛎层年代及古环境初探
Acta Micropalaeontologica Sinica（2014）
Abstract
通过对昆山白莲湖西部一剖面产出的牡蛎层及邻近层位有孔虫化石的鉴定与定量统计分析,并结合沉积物的岩性特征及牡蛎壳体AMS 14C测年数据,揭示了牡蛎层的形成年代及其代表的古环境.研究结果表明,牡蛎层形成于7 230 aBP,其所含的牡蛎与有孔虫群落显示此时为水动力相对较弱的半开放半咸水泻湖环境.
MoreKey words
Ostrea gigas,Oyster,foraminifera,middle Holocene,palaeoenvironment,Bailian lake,Kunshan,Jiangsu Province
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