304 J. C. BKANNER OUTLINES OF THE GEOLOGY OF BRAZIL 



G. T. Prior : Rock specimens collected in the little island of Trindade, south 

 Atlantic, by the Antarctic Expedition of 1839-1843, under Sir James Clark 

 Ross. Mineralogical Magazine, volume XII, pages 317-323. London, No- 

 vember, 1900. 



Dr. Jose Amerigo dos Santos : Cal de marisco. Revista de Engenharia, Anno 

 II, No. 1, 15 de Janeiro de 1880, paginas 4-7. Rio de Janeiro, 1860. Re- 

 vista Industrial, Novembro de 1879, volume V, paginas 137-138. (Dated 

 11 de Agosto de 1879.) New York, 1879. (Shell deposits about Rio de 

 Janeiro. ) 



ScouLER : Account of a voyage to Madeira, Brazil, Juan Fernandez, and the 

 Galapagos Islands, performed in 1824 and 1825, with a view of examining 

 their natural history, etc. Edinburgh Journal of Science, October, 1826, 

 volume V, pages 195-201. Edinburgh, 1826. Notes on the geology of Rio 

 de Janeiro. 



Jose 1 'ranklin da Silva : Descripcao do Itatiaia ou Ititiaio. With figure. 

 (Dated December 3, 1856.) Revista do Instituto Historico do Brazil. 

 Tomo XXXIX, parte I, paginas 4] 8-418. Rio de Janeiro, 1876. 



AuGUSTO Fausto de Souza : A Bahia do Rio de Janeiro, sua historia e de- 

 scripgao de suas riquezas. Revista do Instituto Historico, Tomo XLIV, 

 parte II, paginas 5 et seq. Rio de Janeiro, 1881. Descripgao geral e 

 geologia, paginas 71-73. 



Spix und Martius : Reise in Brasilien, volume I, pages 89-178. Munich. 1823. 



Barao de Villa Franca: Turfas em Macahe e Campos. O Novo Mundo. 

 Outubro 23, 1875, VI, 19. New York, 1875. Extr. do Monitor Campista. 



Fred. E. Wright : Die foyaitisch-theralitischen Eruptivgesteine der Insel Cabo 

 Frio, Rio de Janeiro. Brasilien. Tschermak's Mineralogische und Petro- 

 graphische Mittheilungen, volume XX, pages 234-259, 273-306, with plates. 

 Vienna, 1901. 



RIO GRANDE DO XORTE 



Pi^evious investigations. — The papers of Branner, Crandall, Jenkins, 

 Soper, and Waring are the only ones that treat of the geology of the State 

 of Eio Grande do Norte. There are a few notes, however, by Koster and 

 Bnrlamaqni. 



AreiaBranca 



Oceano Mlaniico 





Figure, 19. — Typical Section from the Archean in the Interior to the Ocean on the Coast 



of Bio Grande do Norte 



R. H. Soper. 



General geology. — The interior of Rio Grande do Norte is of Archean 

 rocks; overlapping these old rocks is a belt or zone of Cretaceous and 

 Tertiary marine sediments along the entire coast. This belt varies in 



