Institution: | 1. Institute of Nature & Environmental Technology, Kanazawa University, Kanazawa 920-1192, Japan; 2. LLRL, Institute of Nature & Environmental Technology, Kanazawa University, Nomi, Ishikawa 923-1224, Japan; 3. Institute of Geology, Geophysics & Mineralogy, SB RAS, Novosibirsk 3-630090, Russia; 4.Center for Chronological Research, Nagoya University, Nagoya 464-8602, Japan |