HOWARD J FALCON-LANG,^1,* PHILIP H HECKEL,² WILLIAM A DIMICHELE,³ BASCOMBE M BLAKE,⁴ CARY R EASTERDAY,⁵ CORTLAND F EBLE,⁶ SCOTT ELRICK,⁷ ROBERT A GASTALDO,⁸ STEPHEN F GREB,⁶ RONALD L MARTINO,⁹ W. JOHN NELSON,⁷ HERMANN W PFEFFERKORN,¹⁰ TOM L PHILLIPS,¹¹ STEVEN J ROSSCOE<sup>12

1</sup>1Department of Earth Sciences, Royal Holloway, University of London, Egham, Surrey TW20 0EX, UK,
²2Department of Geoscience, University of Iowa, Iowa City, Iowa 52242, USA, philip-heckel@uiowa
³3Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington
⁴4West Virginia Geological Survey, 1 Mont Chateau Road, Morgantown, West Virginia 26508, USA, b
⁵5Department of Earth Sciences, Northeastern Illinois University, 5500 North Saint Louis Avenue, Chic
⁶6Kentucky Geological Survey, 228 MMRB, University of Kentucky, Lexington, Kentucky 40506-0107, USA,
⁷7Illinois State Geological Survey, Champaign, Illinois 61820, USA, elrick@isgs.illinois.edu,
⁸8Department of Geology, Colby College, 5807 Mayflower Hill, Waterville, Maine 04901, USA, raga
⁹9Department of Geology, Marshall University, Huntington, West Virginia 25701, USA, stephen.gre
¹⁰10Department of Earth and Environmental Science, University of Pennsylvania, Philadelphia, Pennsylva
¹¹11Department of Plant Biology, University of Illinois, Urbana, Illinois 61801, USA, tlphilli@l
¹²12Department of Geological Sciences, Hardin-Simmons University, 2200 Hickory Street, Abilene, Texas

^*Corresponding author.