摘要
A taskforce led by Prof. PENG Shanchi with the CAS Nanjing Institute of Geology and Palaeontology (NIGP) has persuaded the international geological community that
Ataskforce led by Prof. PENG Shanchi with the CAS Nanjing Institute of Geology and Palaeontology (NIGP) has persuaded the international geological community that the stratotype for the base of Cambrian stage 7 about 503 million years ago is located in central China's Hunan Province.