GENERAL AND ECONOMIC GEOLOGY 287 



trustworthy information available in regard to its location, quality, or 

 quantity. 



Limestone is quarried from the Cretaceous beds at the city of Para- 

 hyba, and there has been talk of the utilization of that rock for the 

 manufacture of Portland cement, but no serious attempts have been made 

 at such manufacture. 



Marble is found at various places within the Archean area, and it is 

 said that it has been used locally for the manufacture of lime, but other- 

 wise it is undeveloped. 



Geologic Maps of Paraliyta 



Branner, 1902.^A geologic map of the eastern end of the state is 

 given in Branner's paper on the "Geology of the Northeast Coast of 

 Brazil," as plate 4 of volume 13 of the Bulletin of the Geological Society 

 of America, 1902. It shows the approximate extent of the Cretaceous 

 and Tertiary sediments in that State. 



R. H. Soper, 1913. — Publication number 26 of the Inspectoria de 

 Obras Contra as Seccas, entitled "Geologia, etc., do Rio Grande de Norte 

 e Parahyba," by Ralph H. Soper, contains a sketch-map of the geology 

 of Parahyba on a scale of 1 to 1,000,000 and with four subdivisions of 

 the geology, namely: (1) gneisses, schists, and granites, (2) sandstones, 

 (3) limestones, (4) sands and clays. 



Bibliography of the Geology of Parahyla 



J. C. Beanneb: Geology of the northeast coast of Brazil. Bulletin of the 

 Geological Society of America, volume 13, pages 41-98. Rochester, 1902. 



Dr. Feederico Leopoldo Cesae Buelamaqui: Noticia acerca dos animaes de 

 ragas extinctas, descobertos em varios pontos do Brazil. Dated Rio, 9 de 

 Junho de 1855. Bibliotheca Guanabarense. Trabalhos da Sociedade Vel- 

 losiana, 1855, paginas 19-20, 2a parte. Rio de Janeiro, 1855 (?). 



F. L. C. Buelamaqui : Noticia acerca de alguns mineraes e rochas de varias 

 Provincias do Brasil, recebidos no Museu Nacional durante o anno de 1855 

 (dated September, 1856). Revista Brazileira, volume II, paginas 73-104. 

 Rio de Janeiro, 1858. 



RoDEEic Ceandall: Geographia, geologia . . . nos estados orientaes do 

 norte do Brazil, Ceara, Rio Grande do Norte e Parahyba. Publication 

 No. 4, series I. D. E. Inspectoria de Obras Contra as Seccas. Rio de 

 Janeiro, 1910. 



I. JoFFiLY : Notas sobre a Parahyba. Geology, paginas 63-88. Rio de Janeiro, 

 1892. 



Heney Kostee: Travels in Brazil. Second edition, in two volumes. London, 

 1817. A few notes on the geology, pages 64-85. 



