 | | Book | | Mineralogy of Michigan by E. W. Heinrich updated and revised • by George W. Robinson M By E W~ Hellnr]ch...Museum Michigan Technological University Houghton, Michigan 49931 2004 © MINERALOGY OF MICHIGAN 3 FOREWORD...FOREWORD Michigan has a long and varied geologic history that includes repeated episodes of volcanism...before the first Europeans set foot here. When Michigan became a state in 1837, one of the first actions...and we continue to learn more about them today. Michigan minerals helped to build the state and nation |  | | Journal (article/letter/editorial) | | Geoscience Section, Ontario Geological Survey, 933 Ramsey Lake Road, Sudbury, Ontario P3E 6B5, Canada ABSTRACT...schistes verts, sous-schistes verts, Supergroupe de Keweenaw. INTRODUCTION This paper is an outgrowth of the...metamorphic domain Berens River Subprovince Red Lake English Winnipeg Bird River Subprovince Uchi ...varies with stratigraphic position. In the Osler Lake Group on Black Bay Peninsula, the upper units are...suggested that the Portage Lake Volcanic Suite of the Keweenawan Supergroup in Michigan was subjected to |  | | Book | | Institute, Houston, USA) and Louise Kellogg (University of California, Davis, USA) for the planet Mars...3.1. Duluth Complex, Mid-continent Rift System, USA 8.3.2. Noril'sk-Talnakh, Siberian Traps, Russia ...Soutbwestern Africa, and the Mid Continent Rift System, USA 9.3.1. Metallogeny ofthe Damara and Irumide orogens..."hotspots", such as the Snake River Plains in the USA, and chains of volcanic islands. A B 100 1~r...(Brazil-Namibia) and the Columbia River Province (northwest USA; see Chapter 3). The idea isthat a mantle plume may |  | | Report (issue) | | minerals of all kinds are covered by alluvium, volcanics, glacial MINERAL RESOURCE ESTIMATES AND PUBLIC...Recently, alunite deposits near Cedar City, Beaver County, Utah, were explored by two companies (Engineering...in Colorado originated in an ancient closed-basin lake environment whose waters were rich in organic matter...Ferruginous bauxite deposits in the Salem Hills, Marion County, Oregon: Oregon Dept. Geology and Mineral Industries...deposits of the Warm Springs District, Meriwether County, Georgia: U.S. Geol. Survey Bull. 1199-I, 15 p |
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