201 



XXII. Contributions to the Geology and Physical 

 Geography of the Lower Amazonas 



BY CH. FRED. IIARTT, 

 Irof. of Geology in Cornell Uuiversity. 



[Read before this Society, January 2, 1874.] 



THE ERER:e-MONTE-ALEGRE DISTRICT AND THE TABLE-TOPPED 



HILLS. 



WOODED PLAINS 



VICINITY OF 



MONTE ALEGRE 



;And erere. 



WOODED PLAINS 



MONTE ALEGRE 



i;i<' ■ ALLUVIAL PLAINS 



Ascending the Amazonas from Para, the topographical features 

 observable from the river for tlie first 300 miles, are very monoto- 

 nous. With the exception of the immediate vicinity of Para, 

 Breves and Garupa, where the land rises to a height of twenty to 

 thirty feet above tide-level, the country is perfectly flat, scarcely 

 above water even in the dry season, and of recent origin. AVhere 



(26) .TANUARr, 1874. 



Bin.. BUF. SOC. NAT. SCI. 



