Friday, 24 March 2017

Next week 27th March to 2nd April 2017

Next Weeks EVENTS

27th March to 2nd April 2017
The following is an extract from Bristol Geology Calendar

More details can be found in the Calendar and on the web sites of the relevant Society or organisation.




 Bristol Nats Lecture - The Origins of Dolomite
WhenWed, 29 March, 19:30 – 20:30
WhereS H Reynolds lecture Theatre, Wills Memorial Building, University of Bristol, BS8 1RJ (map)
DescriptionProfessor Maurice Tucker: The Origins of Dolomite Dolomite is a common sedimentary rock – plenty in the Bristol district and South Wales in the Carboniferous and Triassic, but there is a problem in explaining its origin. Seawater is supersaturated with respect to dolomite but it does not precipitate there; dolomite appears to increase in abundance back through time, being especially common in the Precambrian; to dolomitise a limestone needs much Mg and through-flow of water – but how does that work? Dolomites are very important as reservoirs for oil and hosts of lead-zinc sulphide deposits, so understanding their origin and geometry is important. This talk will examine dolomites from around the world and up and down the geological column and discuss the hot topic as to whether microbes provide the answer. Members of WEGA and other local geological societies are invited to attend and bring proposals for field meetings for 2017.





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