Earth and Environmental Science Transactions of the Royal Society of Edinburgh The Last Scottish Ice Sheet Earth and Environmental Science Transactions of the Royal Society of Journal: Edinburgh Manuscript ID TRE-2017-0022.R1 Manuscript Type: The Quaternary of Scotland Date Submitted by the Author: n/a Complete List of Authors: Ballantyne, Colin; University of St Andrews, Geography and Sustainable ForDevelopment Peer Review Small, David; Durham University, Department of Geography British-Irish Ice Sheet, Deglaciation, Dimlington Stade, Ice streams, Late Keywords: Devensian, Radiocarbon dating, Readvances, Terrestrial cosmogenic nuclide dating Cambridge University Press Page 1 of 88 Earth and Environmental Science Transactions of the Royal Society of Edinburgh The Last Scottish Ice Sheet Colin K. Ballantyne 1 and David Small 2 1 School of GeographyFor and Sustainable Peer Development, Review University of St Andrews, St Andrews KY16 9AL, UK. Corresponding Author (
[email protected] ) 2 Department of Geography, Durham University, Lower Mountjoy, South Road, Durham DH1 3LE, UK. Running head: The last Scottish Ice Sheet Cambridge University1 Press Earth and Environmental Science Transactions of the Royal Society of Edinburgh Page 2 of 88 ABSTRACT: The last Scottish Ice Sheet (SIS) expanded from a pre-existing ice cap after ~35 ka. Highland ice dominated, with subsequent build up of a Southern Uplands ice mass. The Outer Hebrides, Skye, Mull, the Cairngorms and Shetland supported persistent independent ice centres. Expansion was accompanied by ice-divide migration and switching flow directions. Ice nourished in Scotland reached the Atlantic Shelf break in some sectors but only mid-shelf in others, was confluent with the Fennoscandian Ice Sheet (FIS) in the North Sea Basin, extended into northern England, and fed the Irish Sea Ice Stream and a lobe that reached East Anglia.