A Field Guide to the Carboniferous Sediments of the Shannon Basin, Western Ireland

The Carboniferous Shannon Basin of Western Ireland has become one of the most visited field areas in the world. It provides an ideal opportunity for examining a wide range of ancient sedimentary environments, including carbonate shelf, reefs and mud mounds, black shales and phosphates, and a spectrum of deep sea, shallow marine, fluvio-deltaic and alluvial siliciclastic sediments. The area boasts extensive outcrops and some of the most renowned sections through turbidites, large-scale soft sediment deformation features and sediments that display a response to tectonic and sea-level controls. This field guide provides the first synthesis of the principal localities in this area of Western Ireland, and presents an easily accessible handbook that will guide the reader to, and within, a wide range of sedimentary facies, allowing an understanding of the evolving nature of the fill of this Carboniferous basin and the context of its sedimentary and tectonic evolution. The guide summarizes recent and new work in the area by a range of authors and outlines issues of current debate concerning the Shannon Basin and its palaeoenvironmental interpretation. The field guide will find extensive use in teaching and research by academic researchers, professional and amateur geologists, as well as by applied geologists, geophysicists and reservoir engineers who use these outcrops as analogues for subsurface reservoirs in many areas of the world.

Contributors vii Acknowledgements ix About the Companion Website xi 1 Introduction to the Field Guide 1 Jim Best & Paul B. Wignall 2 The Shannon Basin: Structural Setting and Evolution 16 John Graham 3 Basin Models 35 Paul B. Wignall & Jim Best 4 Lower Carboniferous of the Shannon Basin Region 48 Ian D. Somerville 5 Viséan Coral Biostromes and Karsts of the Burren 79 Ian D. Somerville 6 The Clare Shales 97 Paul B. Wignall, Ian D. Somerville & Karen Braithwaite 7 Architecture of a Distributive Submarine Fan: The Ross Sandstone Formation 112 David R. Pyles & Lorna J. Strachan 8 Evolving Depocentre and Slope: The Gull Island Formation 174 Lorna J. Strachan & David R. Pyles 9 The Tullig and Kilkee Cyclothems in Southern County Clare 240 Jim Best, Paul B. Wignall, Eleanor J. Stirling, Eric Obrock & Alex Bryk 10 The Tullig and Kilkee Cyclothems of Northern County Clare 329 Paul B. Wignall, Jim Best, Jeff Peakall & Jessica Ross 11 The Younger Namurian Cyclothems around Spanish Point 350 Paul B. Wignall & Jim Best Appendix: List of GigaPan Images 361 References 362 Index 371