GEXERAL AXD ECONOMIC GEOLOGY 239 



and carbonado regions should consult the papers of Branner, Derby, 

 Crandall, Fnrniss, Gorceix^ and Oliveira. 



The monazite sands are described in a resume by Dr. Calogeras in his 

 "Minas do Brasil e sua legislacao."" pages 447-4:? 7. Other writers on 

 monazite sands are Derb}', Gorceix, Praguer, and Britto. The manganese 

 deposits are spoken of by Branner and are mentioned under "Monazite" 

 above. 



Geologic Maps of Bahia 



Pissis, 1842. — In his Memoire sur la position geologique des terrains 

 de la partie australe du Bresil, par M. A. Pissis, published by the Acad- 

 emy of Sciences at Paris in 1842, the accompanying geologic map in- 

 cludes the geology of the southern part of the State of Bahia. Four 

 divisions of the "terrain primitif^' are shown. The map shows evidences 

 of some work at and south of the Bay of Bahia. 



Branner, Crandall, and ATilliams, 1908. — A map showing the geolog}^ 

 of that part of the State of Bahia lying south of Eio Sao Francisco, east 

 of west longitude 43° and north of latitude 12° 30' was published by the 

 Inspectoria de Obras Contra as Seccas in 1908, under the title "Mappa 

 de parte dos estados da Bahia, Pernambuco e Piauhy e dos estados de 

 Sergipe e Alagoas por J. C. Branner, E. Crandall, e H. E. Williams." 

 It was originally prepared for the Service Geologico e Mineralogico do 

 Brasil, but it was only issued as stated above. It is on a scale of 1 to 

 2,000,000 and shows six geologic subdivisions : crystallines, Jacobina 

 series, Tombador series, Lavras series, Salitre series, and recent Tertiary 

 and Cretaceous — the last three in one color. This map is not accompa- 

 nied by any text. 



Branner, 1909. — A short article by Branner on "the diamond-bearing 

 highlands of Bahia," published in the Engineering and Mining Journal, 

 New York, May 15 and 22, 1909, was accompanied by a geological sketch- 

 map of the region between the city of Bahia and Chique-Chique, on the 

 Eio Sao Francisco. The scale was 1 to 3,030,303 and four geologic 

 divisions were shown, namely: crystalline, Lavras, Salitre limestone. 

 Cretaceous and Tertiary — the last two as one. The geology on that map 

 was based almost exclusively on observations made by the author and his 

 assistants. 



Soper, 1914. — In 1914 the eastern part of the State of Bahia was 

 shown on a map accompanying the report of E. H. Soper to the Inspec- 

 toria de Obras Contra as Seccas. This was publication number 34 of the 

 Inspectoria, and has the title "Geologia e supprimento d'agua subter- 

 renea em Sergipe e no nordeste da Bahia." The map is on a scale of 1 



