《中国各系界线地层及古生物 奥陶系与志留系界线 1》

CONTENTS1

Preface……………………………………………………………………Mu En-zhiResearch Work on Ordovician—Silurian Boundary in China Mu En-zhi1

The Ordovician—Silurian Boundary in Yichang,Hubei Mu En-zhi,Zhu Zhao-ling,Lin Yao-kun and Wu Hong-Ji15

Graptolites from the Ordovician—Silurian Boundary Sections ofYichang Area,W．Hubei Mu En-zhi and Lin Yao-kun45

The Dalmanitina Fauna（Trilobite）from Huanghuachang and Wangjiawan,Yichang County,Hubei Province Zhu Zhao-ling and Wu Hong-ji83

Brachiopods of Latest Ordovician in the Yichang District,WesternHubei,Central China Rong Jia-yu111

On the Material of Glyplograptus persculptus（Salter）from the YangziGorges,China Chen Xu and Lin Yao-kun191

Glyptograptus persculptus Zone——the Earliest Silurian Graptolite Zonefrom Yangzi Gorges,China Lin Yao-kun and Chen Xu203

A Preliminary Study of Paleomagnetism on the Geological Boundaries ofHuanghuachang Section in Yichang Area Ye Su-juan233

Rb-Sr Dating of Lower Silurian Black Shale in Huanghuachang,Yichang Hu Hua-guang,Zhang Ren-hu and Zhao Dong-zhi243

Correlation of Ashgill Graptolite Faunas of Central China and ArcticCanada,with a Description of Diceratograptus cf. mirus Mu fromCanada Chen Xu and A．C．Lenz247

Upper Ashgillian Chitinozoa from Renhuai,Northern Guizhou Geng Liang-yu,Hu Zhao-xun and Gong Lian-zan259

Late Ashgillian Glaciation——Effects of Eustatic Fluctuations on theUpper Yangtze Sea Geng Liang-yu269

Ordovician—Silurian Boundary Section from Jingxian,South Anhui Li Ji-jin,Qian Yi-yuan and Zhang Jun-ming287

Graptolites Across the Ordovician—Silurian Boundary from Jingxian,Anhui Li Ji-jin309

The Graptolite Fauna of the Ordovician—Silurian Boundary Section inYuqian,Zhejiang Ge Mei-yu389

A Species of Dalmanitina（Trilobite）from Deqing and Yuqian Counties,Western Zhejiang Wu Hong-ji455

On the Baota（Pagoda）Formation Chen Ting-en and Zou Xi-ping467

Chitinozoa from the Fenhsiang, Hunghuayuan and Dawan Formationsof Huanghuachang,Yichang,Hubei Geng Liang-yu509