01939oam 2200553 450 991070746330332120160817162300.0(CKB)5470000002464894(OCoLC)889723513(EXLCZ)99547000000246489420140901d1997 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierClastic rocks associated with the Midcontinent Rift System in Iowa /by Raymond R. Anderson and Robert M. McKay[Reston, Va.] :U.S. Department of the Interior, U.S. Geological Survey,1997.[Washington, D.C.] :United States Government Printing Office.1 online resource (145 pages) illustrations, mapsU.S. Geological Survey bulletin ;1989-IStrategic and critical minerals in the midcontinent region, United States ;ch. ITitle from title screen (viewed Aug. 28, 2014).Includes bibliographical references (pages 138-140).GeologyIowaGeology, StratigraphicProterozoicGeologyfastGeology, StratigraphicfastProterozoic Geologic PeriodfastKeweenawan RiftIowafastNorth AmericaKeweenawan RiftfastGeologyGeology, StratigraphicGeology.Geology, Stratigraphic.Proterozoic Geologic Period.Anderson Raymond R.91081McKay Robert M.Geological Survey (U.S.),COPCOPOCLCOOCLCFGPOBOOK9910707463303321Clastic rocks associated with the Midcontinent Rift System in Iowa3533939UNINA