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Information on Symposia per Science Theme

Theme No.

Theme Title

Number of Symposia proposed

Symposia Title

Symposia Conveners

Biographical sketch of the Conveners




Geological Timescale and Dynamic Record

Prof. G. V. R. Prasad

Prof. Kishor Kumar

Prof. Stanley C. Finny (USA)

Prof. Bilal Haq


Recent Headways in Geological Time Scale

1. S. C. Finney


With the development of more refined geochronological techniques and re-fined biozones, the time scale is being constantly upgraded. Candidate Unit Stratotypes and Boundary Stratotypes are continuously evaluated, for their selection as global stratotypes. This symposium invites abstracts on advancements in the Geological Time Scale

Evolution of Palaeozoic sedimentary basins in the Tethys Himalaya - Biodiversity, Biozonation & Bioprovinces

1. Nigel Hughes


2. SK Parcha


The Tethyan sedimentary belt of the Himalayan mountain chain hosts rocks ranging in age from Precambrian to Eocene. Spatial and temporal distribution of faunal and floral assemblages, their depositional environments, global correlation and relationship to other bioprovinces of the Tethyan belt are least understood at present. This symposium invites abstracts on these aspects including mass extinction events and major radiations of animals and plants.

Chronostratigraphy, Geochronology, Depositional Environments and Biotic turnovers across Major Mass Extinction Boundary Intervals in Marine and Continental sections

V. C. Tewari (India)

Gondwana Sedimentation, Climate and Life

PK Singh


Saswati Bandyopadhyay (India)

AK Singh


Sedimentation in the Gondwanaland (South America, Africa, Antarctica, India, Australia, Madagascar) began with a glaciation event in the Upper Carboniferous followed by fluvio-lacustrine sedimentation. Marine pulses have also been recorded in the Permian sequences. The sedimentary history and life of these continents was controlled by the climate to a large extent. The symposium will address palaeoclimatic changes in the southern hemisphere at a time it was assembled into a single super-continent.

In addition, extensive coal deposits during the Permian time will also be discussed including changes in continental vegetation prior to and after the Permian-Triassic mass extinction. Further, semitonid and lung fishes, labyrinthodont amphibians, rhynchosaurs, phytosaurs, aetosaurs, di-nosaurs, pterosaurs, rhynchocephalians, mammal-like reptiles and mammals were thriving during the time of Gondwana assembly. Abstracts are also invited on evolution of vertebrates, their intercontinental affinities and relevance in biozonation and intercontinental correlation.

Break-up of Gondwana,Evolution of Indian Ocean and Development of Marginal marine Basins

DK Pandey


Following the break-up of former Gondwanaland, marine seaways emerged between the constituent continents and marine sedimenta-tion took place in pericratonic areas. Evolution of these sedimentary basins, their tectonic setting, and depositional history, evolution and diversity of fauna and understanding the past biogeographic provinces are focus of this symposium.

Mesozoic Marine Revolutions - Sea Level Changes, Extreme Climates, Mesozoic Bioevents, Biotic Recoveries, & Correlation

B Haq


End of the Triassic Period witnessed a major mass extinction event. Various causes, such as marine regression, volcanism and asteroid impact etc. are suggested as cause for this mass extinction but no consensus achieved so far. The Triassic Period also experienced green house conditions with major faunal turnovers. Correlation of these events at the global scale is needed.

Following the end permian mass extinction, new forms occupied the empty ecological niches. In the marine realm, new primary producers like coccolithophorids, diatoms and dinoflagellates arrived on the horizon. Land vegetation changed from lycopod- sphenopsid dominated flora to gymnosperm and fern dominated flora and then to angiosperm dominated flora. Dinosaurs, birds, and mammals evolved during the Mesozoic Era. Late Jurassic-Early Cretaceous interval is an important period, which coincides with significant environmental fluctuations and elevated levels of extinctions in marine invertebrate fauna and faunal turnovers in low latitude shallow marine faunas and in marine and non-marine vertebrate faunas. These bioevents are the focus of this symposium.

Further, the Cretaceous Period is a classic example of a Greenhouse Earth with ice- free polar regions. There are extensive records of black shales in the ocean and chalk in epicontinental seas. Oceanic-anoxic events are known from the Tethys and Atlantic basins. Understanding these anoxic events is ialso focus of this symposium.

India’s Northward Flight, Closing of Tethys, Rise of Himalaya, Biological Evolution

V C Thakur


Following its rapid northward journey India collided with Asia in the Early Paleogene, which led to the rise of the Himalayan mountain chain. During this collision process, many tectonic and geomorphic features got expressed in the Trans-Himalayan region. Also, following the rise of Himalaya, weathering and erosion of rocks brought large quantities of sediments into the foreland basin. This was further accentuated by the intensification of Indian Summer Monsoon and the interplay of tectonics and climate. This symposium will address the role of tectonics and climate in shaping the geomorphol-ogy of the Himalayan frontal belt.

Paleogene Hyperthermal events––Sedimentologic, Geochemical & Biotic Responses

Vandana Prasad


Paleocene-Eocene Thermal Maximum (PETM) event is one of the greenhouse states that the Earth passed through during its geologi-cal past. During PETM, the average Earth’s surface temperature rose by 6-80C and many organisms were severely affected by this rise in temperature. PETM also led to the diversification of mammalian fau-nas in the Northern Hemisphere and high latitude areas. The effects of this climatic perturbance in the the low latitude areas and Southern Hemisphere are focus of this symposium.