Reviews 



Geologic Map of Brazil. By J. C. Branner. Geological Society 

 of America. "Outlines of the Geology of Brazil With Map." 

 Vol. XXX, pp. 189-338. 1919. 



Branner's Geologic Map of Brazil (Plate I) covers an area as large as 

 that of the United States between the 49th parallel and Mexico, approxi- 

 mately three million square miles. It is on the scale of 1:5,000,000 or 

 I inch to 80 miles. It is thus a wall map similar in scale and scope to the 

 Geologic Map of North America of 191 1. 



This important contribution to our knowledge of South America 

 centers chiefly in the geologic map, to which the accompanying text, 

 although it comprises 150 pages, is merely an accessory. The base map 

 was prepared by Dr. Branner, who constructed it in accordance with all 

 available geodetic data and the personal information which he had 

 gathered, supplemented by the maps listed in the accompanying text. 

 The geologic coloring represents the distribution of the major strati- 

 graphic divisions completely and in some detail for the eastern states, 

 stands for reconnoissance in the Amazon region and along the foothills 

 of the Andes, but is lacking over the central plateau for an area of 

 approximately 500,000 square miles. There are also some other lacunae 

 representing the imperfections of even general information regarding 

 the geology. One of the most conspicuous, because it occurs in an 

 otherwise well-known part of the country, traverses Minas Geraes and 

 Bahia and covers the line of contact between Lower and Upper Permian, 

 which cannot be traced with accuracy in this strip. 



The geology is sketched very broadly. Thirteen divisions of the 

 geologic column are represented, namely: 



