Showing posts with label WEGA and Western Region GS. Show all posts
Showing posts with label WEGA and Western Region GS. Show all posts

Tuesday, 5 November 2013

November 12th - WEGA AND Western Region GS

On Tuesday 12 November, as well our regular WEGA session, there is a Western Regional Group (WRG) lecture. This coincidence continues with the respective speakers, Profs Brian Williams and Ted Nield, who are friends and also went to the same grammar school in Swansea!

WRG lecture: Ted Nield: Incoming! Or, Why We Should Stop Worrying and Learn to Love the Meteorite
Meteorites have been the stuff of legend throughout human history, and since 1980 the idea that dinosaurs were wiped out by a meteorite strike 65 million years ago has become one of the most widely known scientific ideas of all. However, the causes of the end Cretaceous mass extinction were complex, and the idea that major meteorite strikes are always bound to be bad news for life on Earth is being challenged by fresh discoveries. New research is suggesting that 470 million years ago, a stupendous collision in the Asteroid Belt (whose d├ębris is still falling, to this very day) bombarded the Earth with meteorites of all sizes. A revolutionary idea is emerging that the resulting ecological disturbance may have been responsible not only for massive worldwide submarine landslides, but for the single greatest increase in biological diversity since the origin of complex life the hitherto unexplained Great Ordovician Biodiversity Event.
Ted Nield will be known to people from his role as editor of the Geological Society’s monthly magazine Geoscientist, and for his books Supercontinent and his most recent book, Incoming! 
WRG has extended an invitation to WEGA members to attend this lecture.
This talk will be in the Reynolds Lecture theatre (G25) and starts at 18:30


WEGA lecture: Brian Williams : From Bergs to Ergs: the Permo-Carboniferous glaciation of gondwana and its hydrocarbon potential
The supercontinent of Gondwana during Permo-Carboniferous times covered a vast area of some 120 million km2. It mainly comprised the land masses of Africa, Arabia, Australia, Antarctica, South America, India, Madagascar and Sri Lanka. Individual, largely intracratonic basins are of huge dimensions; over 600,000 km2 in South America (Parana Basin) and 450,000 km2 in Australia (Canning Basin). Glaciations shaped the landscape of the supercontinent particularly in the Late Carboniferous and Early Permian when it lay between 35o and 75o S. Petroleum prospectivity within this domain is still in an early phase although in excess of 100 fields have been discovered and are appraised at some 20 billion bbl of oil in place, mainly in Arabia, and 7-10 TCF of gas, largely in Australia. Hydrocarbon occurrences are most common within intracratonic basins with some restricted to foreland and rift basins. Source rocks tend to comprise older or younger mudrock sequences; trap styles are variable, and seal and reservoir rocks occur within the glaciogenic realm.
Glaciogenic facies comprise deposition in a bewildering kaleidoscope of environments and subenvironments assigned to supraglacial, subglacial, terminoglacial and proglacial settings although seal and reservoir facies are normally restricted to the latter two depositional realms. Basin infill-architecture is complex due to rapid changed in facies, both spatially and temporally, and the influence of periodic ice sheet advance and retreat producing multiple phases of erosion.
Current research, centred on Oman and West and South Australia, is addressing these key issues relating to the global evolution of the Permo-Carboniferous ice sheet, climatic versus tectonic control on sedimentation, characterisation of reservoir units and integration of outcrop with subsurface data.
The WEGA lecture will be in G8, and will start at 20:00. The regular WEGA wine and cheese event will be held at 19:30 following the WRG lecture

Friday, 5 February 2010

February 9th and 16th

9th February WEGA invites you to 'Reconstructing Dinosaur Colour' by Professor Mike Benton, from Bristol University.
Mike has stepped in to replace Prof. Bryony Coles who has had to cancel at short notice. We expect her to give her lecture on Doggerland in the autumn.
Mike's lecture follows on from Stuart Kearns' lecture of October 2008. He will be talking about exceptionally well preserved dinosaurs from China and particularly what we can tell about their colour. I wonder if any were yellow with purple spots?
Everyone welcome: S H Reynolds Lecture Theatre, Department of Geology, Wills Memorial Building, University of Bristol 7.30 p.m.

16th February Western Region of The Geological Society is organising:-
Landslide Assessment in the Himalayas - Dr. Andrew Hart
Landslide activity is a major issue increasing affecting the rapidly expanding rural road network of Nepal and Bhutan. Andrew looks at the techniques used by local government geologists and engineers to map, assess and mitigate landslide activity, and the socioeconomic impact of landslide activity on the region. The project involved working in a fascinating region of the world and balancing some very different technical and cultural approaches to dealing with the landslide problems.
S H Reynolds Lecture Theatre, Department of Geology, Wills Memorial Building, University of Bristol. Refreshments available from 6pm, with the meeting commencing at 6.30pm.