Mo in silicate matrices by epithermal neutron activation and inorganic ion exchange.” Analytica Chimica Acta, 251, 297-303. doi: 10.1016/0003-2670(91)87150-6. Sims, K.W.W., E.S. Gladney, C.C. Lundstrom, and N.W. Bower (1988). “Elemental concentrations in Japanese silicate rock standards: a comparison with the literature.” Geostandards Newsletter, 12, 379-389. Choi, M.S., R. Francois, K.W.W. Sims, M.P. Bacon, S. Legger-Brown, A.P. Fleer, L.A. Ball, D. Schneider, and S. Pichat (2001). “Rapid determination of 230Th and 231Pa in seawater by Inductively coupled plasma mass spectrometry.” Marine Chemistry, 76, 99-112. Select climbs High altitude alpine climbing Peru, Cordillera Blanca Nevado Huascaran Sur (6768 meters). The West Face via The Shield (Solo); Nevado Chacraraju (6112 meters) South Face via American Direct; Nevado Artesonraju (6025 meters) Southwest Face (Solo); Nevado Tocllaraju (6032 meters); Nevado Chopicalqi (6354 meters); Nevado Copa (6188 meters); Nevada Wamashraju (5434 meters),West Face via Sims-Hanning Route (V,5.10+) First Ascent. Ecuadorian volcanoes Chimborazo (6263 meters); Cayambe (5790 meters); Sangay (5300 meters). Alaska, Alaska range Mt. McKinley (20,320 feet). West Buttress (as a guide); Moose's Tooth- West Ridge. Ice climbing Scotland Ben Nevis (4,406 feet). North Face. Orion Face Direct Grade VI, Point Five Gully Grade V (Solo), Zero Gully Grade V (Solo). Craig Megaiduh (3,658 feet). North Face, North Post Gully Grade V (Solo). Colorado Bridalveil Falls Grade VI, Ames Falls Grade VI, Skylight Grade V, The Squid Grade VI. Utah Stairway to Heaven Grade V, Great White Icicle Grade IV. Northeastern United States The Promenade Grade VI, Repentance Grade VI, The Black Dike Grade IV. Rock climbing Yosemite Valley, California El Capitan Pacific Ocean Wall VI 5.10 A5, Salathe Wall VI 5.11 A3, Nose VI, 5.11A1. Half Dome North West Face VI 5.11 A1 (6-hours, simultaneously climbing and almost all free); The Rostrum IV 5.11; Washington Column, Astroman IV 5.11 (one day combined ascent). Black Canyon of the Gunnison, Colorado North Chasm View Wall Air Voyage V 5.12+ (First Free Ascent), Scenic Cruise IV 5.10; Journey Home IV, 5.10R; South Chasm View Wall Mirror Wall IV 5.11, Black Jack III 5.10. Painted Wall Southern Arete V 5.10, Mordor Wall VI 5.10 A4. Longs Peak (14,110 feet), Rocky Mountain National Park, Colorado The Diamond Grand Traverse, Yellow Wall V 5.9 A3 (Winter Ascent), Casual Route VI, 5.9. Canyon Country The Witch, Sims-Hesse-Hanning Route, III 5.11+ R (First Free Ascent); Charlie Horse Needle, Sims-Hesse-Hanning Route, II 5.11 or 5.12a (First Free Ascent); Argon Tower, Arches National Park, III