Title Geology and mineral resources of the Congonhas district, Minas Gerais, Brazil. A study of pre-Cambrian sedimentary iron formation and associated deposits of hematite and manganese ores.

Publication Info.

Item Status

Description	v, 90 pages : illustrations, maps (part color) color profiles, tables. ; 29 cm.
Series	United States. Geological Survey. Professional paper ; 290
	Professional paper (Geological Survey (U.S.)) ; no. 290.
Note	Part of illustrative matter is folded in pocket.
	Prepared in cooperation with the Departmento Nacional da Produça͠o Mineral of Brazil under the auspices of the International Cooperation Administration of the United States Dept. of State.
Bibliography	Bibliography: pages 86-87.
Subject	Geology -- Brazil -- Minas Gerais.
	Geology.
	Brazil -- Minas Gerais.
	Mines and mineral resources -- Brazil -- Minas Gerais.
	Mines and mineral resources.
Added Title	Congonhas district, Minas Gerais, Brazil