HOLLABAUGH, Curtis L., Geosciences, University of West Georgia, Carrollton, GA 30118, chollaba@westga.edu

SACKETT, Penny D., Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT 2611 Australia, penny.sackett@anu.edu.au

STONE, George T., Physical Science, Milwaukee Area Technical College, 700 West State Street, Milwaukee, WI 53233-1443, stoneg@matc.edu

HERN, Warren M., Anthropology, University of Colorado at Boulder, 1130 Alpine Avenue, Boulder, CO 80304, bachern@msn.com

ARCE, Osvaldo Sr, Colegio de Geologos de Bolivia, La Paz, 591, Bolivia, osvaldo_arce@yahoo.es and WESSEL, Gregory R., Geology In The Public Interest, P. O. Box 1135, Vashon, WA 98070

SMITH, Kathleen S.¹, HAGEMAN, Philip L.¹, KOENIG, Alan E.², CROCK, James G.¹, YAGER, Tracy J.B.³, and PLUMLEE, Geoffrey S.⁴, (1) U.S. Geological Survey, MS 964D Denver Federal Center, Denver, CO 80225-0046, ksmith@usgs.gov, (2) USGS, Denver Federal Center, MS 973, Denver, CO 80225, (3) U.S. Geological Survey, MS 415 Denver Federal Center, Denver, CO 80225, (4) U.S. Geological Survey, MS 964 Denver Federal Center, Denver, CO 80225

ELDERS, Wilfred A., Earth Sciences, University of California, Riverside, CA 92521, wilfred.elders@ucr.edu

SKIDMORE, Amy, Department of Chemistry and Biochemistry, University of Alaska Fairbanks, 900 Yukon Dr, Rm 194, Fairbanks, AK 99775, aeskidmore@alaska.edu, HAYES, Sarah M., University of Alaska Fairbanks, 900 Yukon Dr, Rm 194, Fairbanks, AK 99775, and SPRY, Paul G., Geological and Atmospheric Sciences, Iowa State University, 253 Science I, Ames, IA 50011

GILLIS, Terry, Recovery 1, Inc, 1805 Stewart Street, Tacoma, WA 98421, tgillis@recovery1.com

ROBINS, Nicholas A., Department of History, North Carolina State University, Withers Hall 467, Raleigh, NC 27695-8108, narobins@ncsu.edu