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This digital map database is compiled from unpublished data andnew mapping by the authors, represents the general distribution ofsurficial and bedrock geology in the mapped area. Together withthe accompanying pamphlet, it provides current information on thegeologic structure and stratigraphy of the area. The databasedelineates map units that are identified by age and lithologyfollowing the stratigraphic nomenclature of the U.S. GeologicalSurvey. The scale of the source maps limits the spatialresolution of the database to 1:31,680 or smaller.
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Some of the highest grade uranium (U) deposits in the United States are hosted by solution-collapse breccia pipes in the Grand Canyon region of northern Arizona. These structures are named for their vertical, pipe-like shape and the broken rock (breccia) that fills them. Hundreds, perhaps thousands, of these structures exist. Not all of the breccia pipes are mineralized; only a small percentage of the identified breccia pipes are known to contain an economic uranium deposit. An unresolved question is how many undiscovered U-bearing breccia pipes of this type exist in northern Arizona, in the region sometimes referred to as the “Arizona Strip”. Two principal questions remain regarding the breccia pipe U deposits...


    map background search result map search result map Geologic Map and Digital Database of Part of the Uinkaret Volcanic Field,Mohave County, Northwestern Arizona Three GIS datasets defining areas permissive for the occurrence of uranium-bearing, solution-collapse breccia pipes in northern Arizona and southeast Utah Geologic Map and Digital Database of Part of the Uinkaret Volcanic Field,Mohave County, Northwestern Arizona Three GIS datasets defining areas permissive for the occurrence of uranium-bearing, solution-collapse breccia pipes in northern Arizona and southeast Utah