Sedimentary environment and distribution of brachiopods during the Changhsingian in Xingwen,Sichuan Province of the uppe......

广西南部板董和柳桥地区晚长兴期台地及台地坳陷区沉积地层中发育两个不同的小型有孔虫动物群,它们与放射虫相伴生,呈实体化石形式......

On the basis of researches over several years on bioslratigraphy of Changhsingian at Meishan Section Din Changxing Couni......

重庆北碚地区晚二叠世长兴期地层出露良好，剖面位于北碚代家沟东北部，经过详细调查研究，在厚度为110．5m的长兴组石灰岩地层中发现有丰......

通过对浙江长兴煤山剖面长兴阶上部和二叠系一三叠系界线地层进行系统切片和研究，共鉴别出小有孔虫化石18属50种。这一丰富的有孔虫......