News


New book from the Department of Geodynamics and Sedimentology

Dan Le Heron and colleagues have just published a new book entitled "Glaciated Margins: the Sedimentary and Geophysical Archive" under the flagship Special Publications series of the Geological Society of London.
This book arose out of a major international conference in 2016 held in Burlington House, London, and brings together contributions from deep time (Cryogenian, Ordovician, Carboniferous-Permian) and more recent (Pleistocene, Modern) in one tome, exploring the general traits of glaciated margins, including rifted margins where the signal of the glacial record becomes somewhat diluted. Collectively surveying marine geophysical datasets through to outcrop data, the broad scope of the book showcases the exciting aspects of Glaciated Margins Science across geological time.

https://sp.lyellcollection.org/online-first/475

Glaciated Margins


New Article

Le Heron, D.P. and Vandyk, T.M. 2019. A Slippery Slope or Cryogenian Diamictites? The Depositional Record, DOI: 10.1002/dep2.67 

How "glacial" really are ancient glacial deposits? Building on previous work that the published recently in Geology, Le Heron and Vandyk show that some of the famous, so-called "glacial" deposits of Death Valley, though to belong to the Marinoan (younger Cryogenian, ca. 650 Ma) global glaciation are unrelated to glaciation at all.
The study substantiates previous work by the likes of Jessica Creveling and colleagues, who emphasised the importance of platform instability and slope collapse. It really is important to not assume that diamictites- jumbled up deposits with large blocks and boulders inside- are glacial, without looking carefully first!