GENERAL AND ECONOMIC GEOLOGY 823 



E. D. Cope : A contribution to the vertebrate paleontology of Brazil. Proceed- 

 ings of the American Philosophical Society, volume XXIII, pages 1-21. 

 Philadelphia, 1886. 



Felisbello Firmo de Oliveira Freire : Historia de Sergipe, 1575-1855. Rio de 

 Janeiro, 1891. Caput IV, paginas lii-lxvi, on the geology, is a resume 

 from Liais and Hartt. 



Ch. Fred. Hartt : Geology and physical geography of Brazil. Maps and Illus- 

 trations, xxiii + 620 pages. Boston, 1870. Sergipe, at pages 378-426. 



Alpheus Hyatt: Report on the Cretaceous fossils from Maroim, Province of 

 Sergipe, Brazil. Hartt's geology and physical geography of Brazil, pages 

 385-393. Boston, 1870. 



Alpheus Hyatt : Pseudoceratites of the Cretaceous. Monograph XLIV, U. S. 

 Geological Survey, Washington, 1913. Vascoceras Harttii from Sergipe, 

 page 103, plate XIV. 



R. H. SoPER : Geologia e supprimento d'agua subterranea em Sergipe e no 

 nordeste da Bahia. Publicagao no. 34 da Inspectoria de Obras contra as 

 Seccas. Rio de Janeiro, 1914. 100 paginas e carta geologica. 



Charles A. White: Contribuigoes a Paleontologia do Brazil (com o original 

 em inglez), Archivos do Museu Nacional. Volume VII, 4°, paginas 1-273, 

 and 28 plates. Rio de Janeiro, 1887. 350 copies of this report were issued 

 as a special edition, dated Washington, January 21, 1888, under the title : 

 "Contributions to the paleontology of Brazil ; comprising descriptions of 

 Cretaceous invertebrate fossils mainly from the provinces of Sergipe, Per- 

 nambuco. Para, and Bahia. By Charles A. White." 



Outlines of the Economic Geology 

 general observations 



It is not my purpose to go into details in regard to the economic geol- 

 ogy of Brazil. For the use of those who may be interested in this par- 

 ticular branch of the subject, a list of the principal mineral resources of 

 Brazil is given below. It should be clearly understood, however, that this 

 list of minerals of economic importance does not pretend to be complete. 

 For example, the statement that the principal known iron deposits are 

 those of Minas, Matto Grosso, and Sao Paulo is not meant to imply that 

 iron does not occur in the other states. It must be constantly kept in 

 mind that the geology of Brazil is incompletely known, and much re- 

 mains to be done in order to disclose all of the mineral resources of the 

 country. New mineral resources are being discovered from time to time, 

 and it is reasonable to believe that Brazil will in time greatly increase 

 the number of her mineral products. 



The list of minerals mentioned below must therefore be regarded as 

 only tentative and subject to change in accordance with any facts that 

 may come to light and to developments that may be made. On the other 

 hand, it is one's duty to distinguish between the simple occurrence of a 



