1. School of Geography, Earth, and Environmental Sciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK
2. Geological Survey of Northern Ireland, Dundonald House, Upper Newtownards Road, Belfast BT4 3SB, UK
3. Scottish Universities Environmental Research Centre, Rankine Avenue, Scottish Enterprise Technology Park, East Kilbride G75 0QF, UK
4. School of Natural Sciences, Department of Geology, Trinity College, Dublin 2, Ireland
5. School of Biological, Earth, and Environmental Sciences, University College Cork, Cork, Ireland