舟山地区晚更新世地层发现疑似古海滩岩

SUSPECTED PALEO-BEACHROCK FOUND IN THE LATE PLEISTOCENE OF ZHOUSHAN AREA

摘要: 舟山东港地区的钻孔资料揭示,埋深47.5~51.5 m的第四纪晚更新世地层,赋存有固结程度较高的薄层砂砾岩,其产状与现代海滩近一致,具有磨圆较好、分选较差、有较多细小孔洞、砾石略定向分布的特点,类似于海滩岩,对此并进行了初步研究。

Abstract: A consolidated thin sandy conglomerate was discovered in the Pleistocene in the interval of 47.5-51.5 m of a bore hole at Dong Gang of Zhoushan area. The rock occurs in conformity with the modern beach, consisting of rounded and poorly sorted pebbles with slightly oriented fabric and high porosity, and looks similar to a beachrock. The lithology and origin of the rock is studied in this paper.