寒武纪丝状蓝细菌生物膜主导和诱发的巨型鲕粒:以河南新安县石井剖面苗岭统徐庄组为例*
梅冥相1,2

Giant ooids induced and predominated by photosynthetic biofilms of filamentous cyanobacteria: an example from the Miaolingian Xuzhuang Formation at the Shijing section in Xin'an County of Henan Province,North China Platform
Mei Ming-Xiang1,2
河南新安石井剖面苗岭统徐庄组顶部巨鲕的基本微观特征 a—泥晶质凝块为核心的同心状放射—泥晶巨鲕,大小为3 mm左右;b—三叶虫化石碎屑核心的同心状放射—泥晶巨鲕,大小为5 mm左右,在巨鲕之间填充着小型放射鲕粒;c—泥晶纹层包覆着3个小型放射鲕和泥晶鲕粒的葡萄石,大小为6 mm左右;d—块状致密泥晶构成外侧皮层的同心状放射—泥晶巨鲕,大小为4 mm左右;e—边缘明显受到磨损的同心状放射—泥晶巨鲕,大小为5 mm左右