PETROGRAPHY 223 



Merrill, G. P. (Rio Grande do Sul, Rosenbusch 



Santa Catharina, and Parang) Turner (Pernambuco) 



Prior (Trindade) Washington (Bahia) 



Reiman Williams, G. H. (Fernando de No- 

 Renaud ronha) 



Ridley Wright 



OuTLUsTES OF THE GENERAL AND ECONOMIC GeOLOGY AND BIBLIOGRAPHY 



BY States 



GENERAL OBSERVATIONS 



In the text the states are arranged alphabetically. 



Those who have occasion to nse the geologic map of Brazil are also 

 liable to have occasion to use what has been published on the geology of 

 the individual states or of other limited areas. For that reason there is 

 given a partial bibliography of the geology of each of the states. 



Under each state is given a brief outline of its general geology, and 

 this outline is followed by a short statement of what is known of its eco- 

 nomic geology. If the information given is often very meager, it is be- 

 cause only meager information is available. 



In the bibliographic lists the titles are arranged alphabetically by 

 authors. 



All the papers referring to the geology of the various states are not 

 given in the state lists for the reason that many of them are merely repe- 

 titions, in one form or another, and treat of the geology only at second 

 or third hand. The idea of giving the titles at all is partly to show the 

 authorities for some of the data used in the geological map of Brazil and 

 partly to enable those who wish to consult the original authorities to find 

 them readily and to obtain fuller information if it should be required. 



If additional titles are wanted, most of them can be found in the 

 author's bibliography of the geology of Brazil, published in the Bulletin 

 of the Geological Society of America, volume 20, pages 1-132, 1909. It 

 should be remembered, however, that many valuable papers have appeared 

 since that list was published. Unfortunately, many of the contributions 

 to the geology of Brazil have appeared only in the daily papers in Eio de 

 Janeiro and are therefore difficult of access to persons outside of that city. 



The island of Fernando de Noronha is politically a part of the State 

 of Pernambuco, and for that reason the titles referring to that island are 

 included in the State of Pernambuco and are followed by the word (Fer- 

 nando) in parentheses, except when the title makes clear its relation to 

 that island. 



The Brazilian island of Trindade, in latitude 20° 30' south, 29° 25' 



