EGS Lectures 2023 - Prof Bruce Levell: Snowball Earth? The Port Askaig Formation

Snowball Earth? The significance of recent work on the Neoproterozoic glacial sediments of the Port Askaig Formation
Recent work by a multi-disciplinary team led by Tony Spencer has resulted in a wide range of new data from the PAF. Much still remains to be understood. This talk details new findings and addresses the significance of these data with respect to: understanding the Dalradian Supergroup as a whole, the lower boundary of the Cryogenian, and the larger issue of what these, probably Sturtian, rocks tell us about the functioning of a “Snowball Earth”. Comparison with Quaternary successions also raises other discussion points. These include the operation of the preservation filter in glacial sequences, origin of cyclicity, and non-actualistic phenomena.

[@eliasrugen659]

Fantastic talk!