PROCEEDINGS 



OF THE 



WASHNGTON ACADEMY OF SCIENCES 



Vol. II, pp. 1S5-201. August 20, 1900. 



RESULTS OF THE BRANNER-AGASSIZ 

 EXPEDITION TO BRAZIL. 



IV. 



TWO CHARACTERISTIC GEOLOGIC SECTIONS ON 

 THE NORTHEAST COAST OF BRAZIL. 



By John C. Branner. 



■» 



CONTENTS : 



Notes on Geology along the Baliia and Minas Railway 185 



Notes on Geology along the Alagoas Railway 195 



Conclusion 201 



NOTES ON GEOLOGY ALONG THE BAHIA AND MINAS RAILWAY. 



In September, 1899, •"• "^^^e two trips over the Bahia and 

 Minas Railway for the purpose of getting some idea' of the 

 geology of the region it crosses. The following observations 

 were made upon those trips, and, notwithstanding their obvious 

 imperfections, are here published as a contribution to the geol- 

 ogy of a little-known part of Brazil. Although railway geology 

 is proverbially untrustworthy, this bit was done under circum- 

 stances that redeem it somewhat. The Director of the rail- 

 way,^ whose guest I was at the time, kindly had the train 

 stopped wherever and whenever I wished, not to mention many 

 other stops at stations, for inspection, and on account of tree 

 trunks and telegraph poles fallen across the line. In order 

 that the geology might be better seen the entire run was made 



^ I am under obligations for many courtesies in connection with this trip to 

 Dr. Joao Bley Filho, of Theophilo Ottoni, the able Director of the Bahia and 

 Minas Railway. 



Proc. Wash. Acad. Sci., August, 1900. (185) 



