MCADAMS, Neo, Texas Tech UniversityDepartment of Geosciences, PO Box 41053, Lubbock, TX 79409-1053, CRAMER, Bradley, Department of Earth and Environmental Sciences, University of Iowa, 115 Trowbridge Hall, Iowa City, IA 52242, DAVIES, Jeremy R., British Geological Survey, Cardiff Office, Cardiff University, Main Building, Park Place, Cardiff, CF10 3AT, United Kingdom, MÄNNIK, Peep, Institute of Geology, Tallinn University of Technology, Ehitajate tee 5, Tallinn, 19086, Estonia and BANCROFT, Alyssa M., Iowa Geological Survey, University of Iowa, 340 Trowbridge Hall, Iowa City, IA 52242