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This first monograph of the graptolites of the middle to late Ordovician period from Northwest China includes more than 100 species and their morphologies

Table of Contents

1. Introduction 2. Biostratigraphy 3. Relations Between Darriwilian and Sandbian Conodont and Graptolite Biozones 4. A Graphic Correlation and Diversity Analysis of the Upper Darriwilian to Lower Katian Graptolites 5. A Comment on the Saergan, Yingan and Equivalent Formations as Potential Source Rocks for Petroleum 6. Systematic Palaeontology

About the Author

Xu CHEN, the former chairman of the International Sub-commission on Ordovician Stratigraphy (ISOS) and the chairman of the International Graptolite Working Group, and Academician of the Chinese Academy of Sciences. For his outstanding and profound work on graptolite and Early Palaeozoic stratigraphy, he won the Charles University Gold Medal of Czech Republic in 1999, Lee Sikuang Geologist Award in 1999, and the National Award of Natural Sciences of China in 2008, among his most important awards. His paper on end-Ordovician mass extinction was awarded The Annual Best Paper of Journal of Paleontology in 2005 Member of the Subcommission on Ordovician Stratigraphy (ISOS)