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Science News

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C Lowry

EARTH SCIENCES DEPARTMENT SEMINAR

 

Vredefort_Dome.jpg

(Image from Wikipedia)

 

 

The Vredefort impact structure, South Africa: witness of a planetary catastrophe, gold deposit and world heritage

 

 

Uwe Reimold

Natural History Museum, Berlin


Thursday 23rd January - 4.00 pm
EARTH SCIENCES SEMINAR ROOM

 

The Vredefort impact structure in South Africa is, at some 250 km diameter and 2.02 Ga age, the oldest and largest currently known impact structure on Earth. It encompasses the entire Witwatersrand Basin of great economic geological significance. Because of the great geological age of this impact and the complex multi-stage metamorphic history of the target terrane the recognition of evidence for impact has long been controversial. Shock microdeformation and the genesis of massive pseudotachylitic breccias and enigmatic impact melt rock deposits
will be discussed, as well as the more recent history of Vredefort as a World Heritage Area.

 

 

    

 

For additional details on attending this or other seminars see http://www.nhm.ac.uk/research-curation/seminars-events/index.html

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