Projet 668 - Equatorial Gondwana History and Early Palaeozoic Evolutionary Dynamics

Projet du PICG - réunion 2018

Meeting on Equatorial Gondwana History and Early Paleozoic Evolutionary Dynamics

  • 29-30 November 2018, Asia Hotel, Bangkok, Thailand
  • 1-5 December 2018, Tarutao Island, Thailand

The meeting will take place over two days and include four sessions of oral presentations and a poster session. Each session will be concluded with a discussion period to facilitate communication and collaboration between people working on these issues. Following the scientific session, a subset of the meeting will depart to Tarutao on the post-meeting excursion. There the groupe will look at outcrops spanning the upper Furongian and Tremadocian.



Bref résumé du projet

Scientific studies of ancient changes in Earth’s physical environment and biota demonstrate the relevance of Earth’s past for our planet’s future. An important ancient interval of transition occurred in the later Cambrian and early Ordovician, some 500 to 450 million years ago.

It included change from repeated intervals of evolutionary “boom and bust” (rapid evolutionary radiation followed by dramatic collapse of diversity) in Cambrian shallow seas into a more stable and enduring biota in the Ordovician and thereafter. This change was linked to a late Cambrian peak and early Ordovician decline in global explosive volcanism that is recorded in particular detail in the equatorial Gondwanan terrane of Sibumasu: Thailand, Myanmar, Malaysia, and Baoshan, China. In these areas fossils are repeatedly interbedded with datable volcanic ashes.

Global volcanism also resulted in rapid changes in atmospheric CO2, and in widespread marine anoxia. The relationship between such environmental stresses and faunal turnover has societal significance today, but our ability to learn from this instructive episode is hindered by a lack of high-precision temporal resolution. The project will coordinate international effort to realize the research and educational potential of the Sibumasu record in its equatorial Gondwanan and global context.

The co-leaders are internationally recognized researchers in these topic areas from leading academic institutions in Thailand, Myanmar, China, Japan and United States of America.

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