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CYANOBACTERIA FOSSILS AND THE MICROBORINGS ON THE ARCHAEOCYATHIDS FROM THE SHUIJINGTUO FORMATION OF THE CAMBRIAN(SERIES 2),YICHANG,HUBEI PROVINCE

CYANOBACTERIA FOSSILS AND THE MICROBORINGS ON THE ARCHAEOCYATHIDS FROM THE SHUIJINGTUO FORMATION OF THE CAMBRIAN(SERIES 2),YICHANG,HUBEI PROVINCE

湖北宜昌寒武系水井沱组古杯化石上蓝菌类及其微型钻孔