OR/18/139 Acknowledgements

Melchin, M J1, Davies, J R2, De Weirdt, J3, Russell, C4, Vandenbroucke, T R A3, Zalasiewicz, J A. 2018. Integrated stratigraphic study of the Rhuddanian-Aeronian (Llandovery, Silurian) boundary succession at Rheidol Gorge, Wales: a preliminary report. British Geological Survey Internal Report, OR/18/139. 1  Department of Earth Sciences, St. Francis Xavier University, Antigonish, NS, Canada 2  Department of Geography & Earth Sciences, Aberystwyth University, Aberystwyth SY23 3DB, UK (also British Geological Survey, Cardiff Office, Cardiff University, Main Building, Park Place,Cardiff, CF10 3AT, Wales, UK) 3  Department of Geology, Ghent University, Krijgslaan 281 S8, BE-9000, Ghent, Belgium 4  School of Earth and Environment, University of Leeds, Leeds LS2 9JT, UK 5  Department of Geology, University of Leicester, University Road, Leicester LE1 7RH, UK

Melchin et al. (2016), at the International Geoscience Programme Project 591 — Closing Meeting ‘The Early to Mid Palaeozoic Revolution’ (Ghent University, 2016), presented the preliminary results of an ongoing study to assess the candidacy of the famous Rheidol Gorge section (mid Wales, UK) as a replacement GSSP for the base Aeronian Stage. A group of conference participants were shown the section as part of the post-conference field trip to the Welsh Basin. This report represents an updated and revised version of the field guide compiled for that visit.

The land owners at Bryn-brâs Farm and the George Borrow Hotel are warmly thanked for facilitating vehicular access both for the post-conference visit and during the course of our study. Mark Williams assisted with the field logistics and sample collection and Rosemary Melchin and James Wilkinson also assisted in the collection of the graptolite and isotope samples. Several of the figures in this account bear testimony to the excellent drafting skills of Antony Smith (Aberystwyth University). Support staff at Ghent and Leicester universities are also warmly thanked for their assistance in the preparation of samples. Financial assistance to MJM for this project was provided by a Natural Sciences and Engineering Research Council of Canada Discovery Grant. As an Honorary Research Associate, JRD also acknowledges the support of staff at BGS notably Rhian Kendall (BGS Cardiff Office) for her review of the submitted manuscript and for facilitating its approval and release.