浙东沿海新元古代地层的发现及其意义

THE DISCOVERY OF UPPER PROTEROZOIC STRATUM ALONG THE COASTAL AREA OF EAST ZHEJIANG AND ITS SIGNIFICANCE

在浙东沿海大片中生代火山岩覆盖区的永嘉县枫林镇附近、地层时代原定为上侏罗统茶湾组（J3c）或下白垩统馆头组（K1g）的一套沉积地层中，首次发现较为丰富的、曾产于中国某些地区新元古界和俄罗斯陆台与西伯利亚陆台上里菲及文德系中的微古植物化石。据此．该地层时代应属于新元古代。从而为研究浙东沿海基底构造提供了重要而可靠的窗口。

Micropaleobotanical fossil which had been found in upper Proterozoic of some strata in China and upper Riphian as well as Vendian system is Russian and Siberia platforms, was first discovered in Cawang formation(J3c ) of upper Jurassic or Guantou formation(K1g ) of lower Cretaceous sedimentary strata near Fenglin town at Yongjia county along the reaches of east Zhejiang Mesozoic volcanic areas. Based on the standard fossil, the stratum should helong to upper Proterozoic. The discovery of upper Proterozoic stratum provides important information for studying basic tectonics along the coastal area of east Zhejiang.