02203oam 2200589 450 991070710510332120160721165622.0(CKB)5470000002462452(OCoLC)937435762(OCoLC)889716031(EXLCZ)99547000000246245220160208d1993 ua 0engurmn|||||||||txtrdacontentcrdamediacrrdacarrierGeology of volcanic rocks in the south half of the Ishpeming greenstone belt, Michigan /by Theodore J. Bornhorst and Rodney C. Johnson[Reston, Va.] :U.S. Department of the Interior, U.S. Geological Survey,1993.[Washington, D.C.] :United States Government Printing Office.1 online resource (iii, 13 pages) illustrations, mapsContributions to Precambrian geology of Lake Superior region ;ch. PU.S. Geological Survey bulletin ;1904-PTitle from title screen (viewed May 17, 2016).Includes bibliographical references (page 13).Ishpeming greenstone belt, MichiganVolcanic rocks, south half Ispheming greenstone belt, MichiganVolcanic ash, tuff, etcMichiganGeology, StratigraphicArchaeanGeologyMichiganArchaean Geologic PeriodfastGeologyfastGeology, StratigraphicfastVolcanic ash, tuff, etcfastMichiganfastVolcanic ash, tuff, etc.Geology, StratigraphicGeologyArchaean Geologic Period.Geology.Geology, Stratigraphic.Volcanic ash, tuff, etc.Bornhorst Theodore J.1415671Johnson R. C(Rodney C.),Geological Survey (U.S.),OCLCEOCLCECOPGPOBOOK9910707105103321Geology of volcanic rocks in the south half of the Ishpeming greenstone belt, Michigan3518400UNINA