About HORTON R A JR
About Colorado School of Mines
About GEISSMAN J W
About Colorado School of Mines
About TSCHAUDER R J
About Hecla Mining Co.
About Geophysical Research Letters
About Carboniferous Period
About Paleomagnetism,rock magnetism
About ミシシッピー
About 炭酸塩岩
About 層
About 古地磁気
About 岩石磁気
About 区域
About ドロマイト化
About 年代