306 J. C. BEANNER OUTLINES OF THE GEOLOGY OF BRAZIL 



barense. Trabalhos da Sociedade Vellosiana, 1855, paginas 1-21 (2a 



parte). Rio de Janeiro, 1855 (?). 

 R. Crandall: GeograpMa, geologia, supprimento d'agua, transportes e aguda- 



gem nos estados orientaes do norte do Brazil, Ceara, Rio Grande do Norte, 



Parahyba. Publicagao No. 4, Serie I. D. E. Inspectoria de Obras Contra 



as Seccas. Rio de Janeiro, Outubro, 1910. 

 Olaf p. Jenkins : Geology of the region about Natal, Rio Grande do Norte, 



Brazil. Proceedings of the American Philosophical Society, volume LII, 



pages 431-466, Philadelphia, September-October, 1913. 

 Henry Koster : Travels in Brazil. Second edition, in two volumes. London, 



1817. Volume I. Notes on the geology of Rio Grande do Norte, volume I, 



pages 86-151. 

 Ralph H. Soper : Geologia e supprimento d'agua subterranea no Rio Grande 



do Norte e Parahyba. Publicagao No. 26 de Inspectoria de Obras contra 



as Seccas, Ministerio da Viagao e Obras Publicas. 8°, illustrated, 62 



paginas. Rio de Janeiro, Julho, 1913. 

 G. A. Waring: Reef formations of the northeast coast of Brazil. American 



Journal of Science, volume 187, pages 367-390. May, 1914. 



RIO GRANDE DO SUL 



Previous investigations. — The base map of the State has been con- 

 structed from the list of latitudes and longitudes published by Dr. H. 

 Morize, of the Observatorio !N'acional at Rio de Janeiro, and from the 

 map of the State "Organizado na Directoria da Yiacao da Secretaria das 

 Obras Publicas . . . 1907-1911," but without the name of the author. 



The literature relating to the geology of Eio Grande do Sul has always 

 been overshadowed by the importance of the coal found in that state. 

 Every writer on the geology has felt it to be his duty to enlarge on or to 

 repeat the oft-repeated descriptions of the coal deposits, coal mines, oper- 

 ations, and exports. The gold and copper deposits have also come in for 

 their share of interest, while the general geology of the state has received 

 but scant attention. 



Valuable contributions to the geology of the state have been suggested 

 by the work done in Uruguay by Walther and Guellemain, while the 

 work of Walther in the vicinity of Lavras and Cacipava is among the 

 best papers on the geology of that state. 



The work of Dr. F. A. de Vasconcellos Pereira Cabral, done on the coal 

 regions and published in 1851, is not only a valuable contribution to 

 Brazilian geology, but it still stands as an excellent and thoroughly con- 

 scientious piece of detailed work at a time when the data obtainable from 

 the coal mines were not available and when there was but little interest 

 in the geology of the state. 



Sellow's notes on Rio Grande do Sul are excellent, though they were 

 made in 1823 and in spite of the fact that it is difficult to locate many of 



