DAVIS, James F., California Geol Survey (retired), 1355 Brickwell Way, Carmichael, CA 95608, BERG, Thomas, Ohio Geol Survey, 4383 Fountain Square, Columbus, OH 43224-1362, SCHUSTER, Robert, US Geol Survey, Box 25046, ms 966, Denver, CO 80225, HIGHLAND, Lynn, Denver Federal Ctr, US Geol Survey, Denver, CO 80225-0046, BOBROWSKY, Peter, Geol Survey of Canada, 601 Booth Street, Ottawa, ON K1A 0E8, Canada and GORI, Paula, US Geol Survey, National Center, 908 Sunrise Drive, Reston, VA 2019-0001, jamesdavis93@comcast.net, jamesdavis93@comcast.net