Institution: | University of Minnesota, Department of Geology and Geophysics, 310 Pillsbury Dr. SE, Minneapolis, MN 55455. E-mail:;Sanborn, Head, &Associates, 6 Garvins Falls Rd., Ste. 1, Concord, NH 03301. E-mail:;University of New Hampshire, Department of Earth Sciences, 121 James Hall, Durham, NH 03824. |