SMITH-KONTER, Bridget, SOLIS, Teira, and CAMERON, Marissa, Department of Geological Sciences, University of Texas at El Paso, El Paso, TX 79968-0555, brkonter@utep.edu

PORTER, Ryan C.¹, FOUCH, Matthew J.¹, WEST, John D.², and ALLISON, Chelsea M.², (1) Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road, NW, Washington, DC 20015, rporter@dtm.ciw.edu, (2) School of Earth and Space Exploration, Arizona State University, P.O. Box 871404, Tempe, AZ 85287

DOMROIS, Stefanie¹, MARSHAK, Stephen², ABERT, Curtis³, LARSON, Timothy⁴, PAVLIS, Gary L.⁵, HAMBURGER, Michael W.⁵, and GILBERT, Hersh⁶, (1) Dept. of Geology, University of Illinois, 208 Natural History Bldg, 1301 W. Green St, Urbana, IL 61801, domrois2@illinois.edu, (2) Dept. of Geology, Univ. of Illinois, 1301 W. Green St, Urbana, IL 61801, (3) Illinois State Geological Survey, University of Illinois, 136 Natural Resources Bldg, 615 E. Peabody Dr, Champaign, IL 61820, (4) Illinois State Geological Survey, University of Illinois, 462 Natural Resources Bldg, 615 E. Peabody Dr, Champaign, IL 61820, (5) Dept. of Geological Sciences, Indiana University, Bloomington, IN 47405-1405, (6) Dept. of Earth & Atmospheric Sciences, Purdue University, 550 Stadium Mall Drive, West Lafayette, IN 47907

HOLT, William E.¹, GHOSH, Attreyee¹, and STEIN, Seth², (1) Geosciences, Stony Brook University, Stony Brook, NY 11794, (2) Earth and Planetary Sciences, Northwestern University, 1850 Campus Drive, Evanston, IL 60208-2150, seth@earth.northwestern.edu

FRASSETTO, Andrew, WOODWARD, Robert, and ADINOLFI, Andrew, IRIS, 1200 New York Avenue, NW, Suite 400, Washington, DC 20005, andyf@iris.edu

SCHMANDT, Brandon, Caltech, Pasedena, CA 91125, schmandt@caltech.edu, LIN, Fan-Chi, Caltech, Pasadena, CA 91125, FOUCH, Matthew J., Department of Terrestrial Magnetism, Carnegie Institute of Washington, 5241 Broad Branch Road, NW, Washington, DC 20015, DUEKER, Ken G., Geology and Geophysics, Univ of Wyoming, Laramie, WY 82071, BECKER, Thorsten W., Department of Earth Sciences, University of Southern California, 3651 Trousdale Parkway, Zumberge Hall 117, Los Angeles, CA 90089-0740, and LIU, Lijun, University of Illinois, Mail Stop 100-23, Champaign, IL 61820

WHITMEYER, Steven J., Geology and Environmental Science, James Madison University, 395 S. High St, MSC 6903, Harrisonburg, VA 22807, whitmesj@jmu.edu, KARLSTROM, Karl E., Earth and Planetary Science, University of New Mexico, Albuquerque, NM 87131, and MEIER, Bethany, Geology & Environmental Science, James Madison University, Harrisonburg, VA 22807

TUDEK, John, Department of Geology and Geography, West Virginia University, 98 Beechurst Ave, 330 Brooks Hall, Morgantown, WV 26506-6300, hewhocaves@gmail.com, VESPER, Dorothy J., Department of Geology and Geography, West Virginia University, 330 Brooks Hall, Morgantown, WV 26505, and LOUGHNEY, Katharine M., National Park Service, Chesapeake & Ohio Canal National Historical Park, 1850 Dual Highway, Suite 100, Hagerstown, MD 21740