01870nem 2200469Ia 450 991069650900332120080519123140.0(CKB)5470000002379766(OCoLC)228300733(EXLCZ)99547000000237976620080519d2003 ua engb|||||||||||||||||||||durcnu|||m||||crdrdacontentcrdamediacrrdacarrierFerricrete, manganocrete, and bog iron occurrences with selected sedge bogs and active iron bogs and springs in the upper Animas River watershed, San Juan County, Colorado[electronic resource] /by Douglas B. Yager ... [and others]Version 1.1.Denver, Colo. :U.S. Dept. of the Interior, U.S. Geological Survey,2003.1 electronic map HTML, digital, PDF fileU.S. Geological Survey miscellaneous field studies map ;MF-2406Title from HTML index page (viewed Apr. 3, 2003).Includes text, col. ill., and index map.Includes bibliographical references.BogsColoradoSan Juan CountyMapsIron oresGeologyColoradoSan Juan CountyMapsManganese oresGeologyColoradoSan Juan CountyMapsMaps.lcgftBogsIron oresGeologyManganese oresGeologyYager Douglas B1384350Geological Survey (U.S.)GPOGPOBOOK9910696509003321Ferricrete, manganocrete, and bog iron occurrences with selected sedge bogs and active iron bogs and springs in the upper Animas River watershed, San Juan County, Colorado3539677UNINA