According to analysis, beachrock is mabe up of terringenous clastic and bioclast, the cement are mainly aragonite and high Mg calcite. 14C dating data of beachrock samples show that Lianyungang beachrock formed in the Early Holocene.

• 经岩石样品及簿片、扫描电镜、~(14)C同位素等分析测定；海滩岩主要由陆源碎屑和生物碎屑组成；胶结物为文石和高镁方解石.