Geological Society, London, Special Publications Online First published March 8, 2012; doi 10.1144/SP368.1 v.368, first Geological Society, London, Special Publications Winsemann Jörg Lang, Richard J. Dixon, Daniel P. Le Heron and Jutta Illizi Basin, Algeria correlation of Upper Ordovician glaciogenic deposits, Depositional architecture and sequence stratigraphic service Email alerting new articles cite this article to receive free e-mail alerts when here click request Permission part of this article to seek permission to re-use all or here click Subscribe Collection London, Special Publications or the Lyell to subscribe to Geological Society, here click How to cite First and how to cite articles for further information about Online here click Notes © The Geological Society of London 2012 10.1144/SP368.1 Geological Society, London, Special Publications published online March 8, 2012 as doi: