近十年来,我国东部沿海地区新生界碳酸盐岩,特别是生物灰岩的含矿性,已引起人们广泛的注视。其中海相生物化石的发现,涉及到碳酸盐岩的形成环境和我国东部早第三纪地质发展历史。为此,1976年笔者对(土布)心群碳酸盐岩进行了野外调查及室内研究,首次发现了有孔虫、虫管、藻类等化石及藻叠层石。本文将简要地叙述碳酸盐岩的特征,并探讨其形成环境。 In recent ten years, the mineralization of Cenozoic carbonate rocks, especially biogenic limestone, in the eastern coastal areas of our country has caused widespread attention. The discovery of marine-related fossils involves the formation of carbonate rocks and the geological history of early Tertiary in Eastern China. Therefore, in 1976 I conducted a field investigation and laboratory research on the (Cubu) Xinxuan carbonate rocks. For the first time, fossils and strata of fossils such as foraminifera, insect tubes and algae were found. This article will briefly describe the characteristics of carbonate rocks and explore their formation environment.