RUSMORE, Margaret E.¹, GEHRELS, George E.², CECIL, M. Robinson³, STOWELL, Harold H.⁴, WOODSWORTH, Glenn J.⁵, PECHA, Mark⁶, YOKELSON, Intan⁶, CHISOM, Charles¹, TRAUTMAN, Marshall¹, and BOGUE, Robert R.¹, (1) Geology, Occidental College, Los Angeles, CA 90041, rusmore@oxy.edu, (2) Arizona LaserChron Center, Department of Geosciences, University of Arizona, Tucson, AZ 85721, (3) Department of Geological Sciences, California State University Northridge, 18111 Nordhoff St, Northridge, CA 91130-8266, (4) Department of Geological Sciences, Univ of Alabama, Box 870338, Tuscaloosa, AL 35487-0338, (5) Geol Survey of Canada, 101-605 Robson St, Vancouver, BC V6B 5J3, (6) Department of Geosciences, University of Arizona, Tucson, AZ 85721

GEHRELS, George, Dept. of Geosciences, University of Arizona, 1040 E. 4th Street, Tucson, AZ 85721, ggehrels@gmail.com and RUSMORE, Margaret E., Geology, Occidental College, Los Angeles, CA 90041

HOLE, John A.¹, WANG, Kai¹, SPENCE, George D.², STEPHENSON, Andrew L.², MILLER, Kate C.³, CLOWES, Ronald M.⁴, HOLLISTER, Lincoln S.⁵, and ANDRONICOS, Christopher L.⁶, (1) Geosciences, Virginia Tech, Blacksburg, VA 24061, hole@vt.edu, (2) Earth and Ocean Sciences, University of Victoria, Victoria, BC V8W 3V6, Canada, (3) Department of Geology and Geophysics, Texas A&M University, College Station, TX 77843, (4) Dept. of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC V6T 1Z4, Canada, (5) Geosciences, Princeton University, Princeton, NJ 08544, (6) Earth and Atmospheric Sciences, Purdue University, West Lafayette, IN 47907

BROWNLEE, Sarah J., Department of Geology, Wayne State University, 0224 Old Main, Detroit, MI 48208, RENNE, Paul R., Berkeley Geochronology Ctr, 2455 Ridge Rd, Berkeley, CA 94709-1211, HOLLISTER, Lincoln S., Geosciences, Princeton University, Princeton, NJ 08544, linc@princeton.edu, and FEINBERG, Joshua, Institute for Rock Magnetism, University of Minnesota, Department of Earth Sciences, 310 Pillsbury Drive SE, Minneapolis, MN 55455

HOUSEN, Bernard A., Geology, Western Washington University, 516 High St, Bellingham, WA 98225, bernieh@wwu.edu

WARD, William P., Department of Earth and Environmental Science, University of Iowa, 121 Trowbridge Hall, Iowa City, IA 52245, william-ward@uiowa.edu, MCCLELLAND, William C., Department of Earth and Environmental Sciences, University of Iowa, 121 Trowbridge Hall, Iowa City, IA 52242, and GEHRELS, G.E., Department of Geosciences, University of Arizona, Tucson, AZ 85721

SCHIARIZZA, P., British Columbia Geological Survey Branch, Victoria, BC V8W 9N3 Canada, Paul.Schiarizza@gov.bc.ca

GUEST, Bernard, Dept. of Geoscience, University of Calgary, Calgary, AB T2N 1N4, Canada, bguest@ucalgary.ca, BACQUE, David, Geoscience, University of Calgary, Calgary, AB T2N1N4, Canada, MILES, Naomi, Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB T6G 2E3, Canada, and STOCKLI, Daniel F., Department of Geological Sciences, University of Texas at Austin, Austin, TX 78712

STEVENS, Liane M.¹, BALDWIN, Julia A.¹, and CROWLEY, James L.², (1) Department of Geosciences, University of Montana, Missoula, MT 59812, liane.stevens@umontana.edu, (2) Department of Geosciences, Boise State University, 1910 University Drive, Boise, ID 83725-1535

KUIPER, Yvette D., Geology and Geological Engineering, Colorado School of Mines, 1516 Illinois Street, Golden, CO 80401, ykuiper@mines.edu, WILLIAMS, Paul F., Department of Earth Sciences, University of New Brunswick, 2 Bailey Drive, Fredericton, NB E3B 5A3, Canada, and HAMILTON, Michael A., Jack Satterly Geochronology Lab, Dept. of Earth Sciences, University of Toronto, Toronto, ON M5S 3B1

ISRAEL, Steve A., Yukon Geological Survey, 91807 Alaska HWY, Whitehorse, YT Y1A 5B7, Canada, steve.israel@gov.yk.ca, MURPHY, Donald C., Yukon Geological Survey, Box 2703 (K10), Whitehorse, YT Y1A 2C6, Canada, CROWLEY, James L., Department of Geosciences, Boise State University, 1910 University Drive, Boise, ID 83725-1535, and FRIEDMAN, Richard M., Pacific Centre for Isotopic and Geochemical Research, Univ of British Columbia, 6339 Stores Road, Vancouver, BC V6T 1Z4, Canada

HENDERSON, Martha A., University of Victoria now with British Columbia Geological Survey, Ministry of Energy and Mines, PO Box 9320 Stn Prov Govt, Victoria, BC V8W 9N3, Canada, martha.henderson@gov.bc.ca, MIHALYNUK, Mitchell G., British Columbia Geological Survey, BC Ministry of Energy and Mines, PO Box 9320 Stn Prov Govt, Victoria, BC V8W 9N3, Canada, SIGLOCH, Karin, Earth Sciences Department, University of Oxford, South Parks Road, Oxford, OX13AN, United Kingdom, JOHNSTON, Stephen T., School of Earth and Ocean Sciences, University of Victoria, Bob Wright Centre, PO Box 1700 STN CSC, Victoria, BC V8W 2Y2, Canada, and SHEPHARD, Grace, Centre for Earth Evolution and Dynamics, University of Oslo, PO Box 1048 Blindern, Oslo, 0316, Norway

ANDERSON, Thomas H., Geology and Planetary Science, University of Pittsburgh, Pittsburgh, PA 15260, taco@pitt.edu

MIHALYNUK, Mitchell G., British Columbia Geological Survey, Victoria, BC V8W 9N3, Canada, Mitch.Mihalynuk@gov.bc.ca and SIGLOCH, Karin, Earth Sciences Department, University of Oxford, South Parks Road, Oxford, OX13AN, United Kingdom