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Filling the Gap Between the Cambrian Explosion and the Great Ordovician Biodiversification Event (GOBE): Proceedings of the International Geoscience Programme (IGCP) Project 653 Annual Meeting (October 8th-12th, 2017, Yichang, China)

Preface

The Intemational Geoscience Programme (IGCP)Project 653 is dedicated to investigating the onset of the"Great Ordovician Biodiversification Event(GOBE), by bringing together and sponsoring specialists from all parts of the world to address this perplexing theme. The GOBE, one of the major biodiversification events of the Phanerozoic, was characterized by a magnificent increase in marine biodiversity largely within the phyla established during the" Cambrian Explosion, and by construction of a complex food web and the eventual establishment of modern marine ecosystems. There have been substantial studies of the diversity changes through the Ordovician: however. one of the remaining questions is when and how the GOBE occurred, ie the timing and triggering factors of the event. 
 

The onset of the GOBE seems quite likely to have had its roots in the Furongian (ate Cambrian)or even earlier; thus, the question of whether the Cambrian Explosion and the GOBE were two separate events or a single one is a current matter of debate. It has been proposed that at least one significant biotic extinction event occurred immediately prior to or at the beginning of the Furongian, which abruptly terminated a majority of the body plans and many weird organisms that originated during the Ediacaran-cambrian transition and subsequently dominated the Cambrian ocean. As a result, the Furongian- earliest Ordovician interval was typified by low biodiversity in the ocean, particularly of the most benthic communities; instead, planktonic organisms flourished and predominated. Although most of organisms that diversified in the GOBE. such as trilobites, brachiopods, and echinoderms, appeared in the early Cambrian, other groups of organisms originated in the Furongian-earliest Ordovician interval, e.g. bryozoans, cephalopods, conodonts, chitinozoans, and probably also planktonic graptolites. Was there a"plankton revolution2 If so. when precisely did this occur? Did the late Cambrian SPICE (Steptoean Positive Carbon Isotope Excursion)event trigger the plankton revolution by means of an oxygenation event? To 

address these questions, IGCP Project 653 is carrying out an interdisciplinary study of this specific interval, including the palaeontology, stratigraphy, sedimentology, geochemistry. palaeoclimatology, and paleoceanography, with a global scope As both the Cambrian Explosion and the GOBE have been the subject of much attention and well documented. now it is time to fill the gap separating these two great events by focusing on research on this poorly understood interval, South China, renowned

for the preservation of highly continuous and well-developed successions from the Guzhangian (Cambrian Series 3) to the Upper Ordovician, is among the few classic regions where specialists from all parts of the world can investigate well-exposed sections, discuss critical topics, and figure out possible patterns by participating in the meeting and field trips. In this region, six GSSPS(Global Standard Stratotype-sections and Points) have been established in the past twenty years, for the Guzhangian, Paibian, and Jiangshanian stages of the cambrian Period and the Dapingian,  ........

 

 

Part 1 Exteaded Summaries

The Precise Age of the Fezouata Lagerstiitte, Lower Ordovician, Morocco
The Post-Extinction Anji Biota (Zhejiang, China) and a Wider Hirnantian Sponge Mega-Community
Geographic Disparity of Graptolite Faunas During the Late Katian Biodiversification Event
Melanosclerites: A Special Kind of Paleozoic Microfossil and New Discoveries in China
Rusophycus carleyi on the Edge of the Siberian Platform
Geochemical Evidence for Ordovician Oxygenation: Another Driver of the ‘Great Ordovician Biodiversification Event'
Cephalopod Palaeobiogeography in Northeastern Peri-Gondwana During the Middle-Late Ordovician
Early Evolution of Nautiloid Faunas Through the Cambrian-Ordovician Transition: A General Overview
Geometric Morphometric Analysis of Protoconites from the Lower Cambrian Yanjiahe Formation, Yichang, Hubei, China
Ecology, Biofacies, Biogeography and Systematics of Micromorphic Lingulate Brachiopods from the Ordovician (Darriwilian to Sandbian) of South-Central China
A High-Performance Parallel CONOP Program Based on a Hybrid Strategy of Simulated Annealing and Genetic Algorithm
Ecological Gradient of a Brachiopod Fauna from South China after the End-Ordovician Mass Extinction and Its Significance
Integrated Conodont Biostratigraphy and Carbon Chemostratigraphy of the Upper Ordovician Shiyanhe Formation at the Sigang Section, Neixiang, Henan, Central China
Keratose-like Sponges in Lower Paleozoic Successions and Their Implications for Paleoecology and Carbonate Sedimentology

Part 2 Guides for Mid-and Post-Conference Field Trips
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Appendix: Conference Programme
Authors Index

 

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