380 



THE CEETACEOUS AND TERTIAKY GEOIiOOY 



seen promineiuly on the Alagoas side of the Kio Sjio Fiancisco, where it is known as 

 the Serra de Maiuba. To the south-west diflferent portions of the ranges are known 

 by diflferent names, the section next to Itabaiana being called the Serra Comprida, and 

 that next the Cajahyba. It is evident at a glance that this range of hills bears the 

 same relation throughout to the general Sergipe- Alagoas basin as the Itabaiana beds 

 bear to those lying immediately between them and the ocean.* 



The section across the region given below shows the general relations of the 



various beds. 



The following sketch looking north-east from the top of Itabaiana, shows the 



Looking north-east from Itabaiana. 



continuation of the range in a line of detached peaks, the rocks of which all dip 

 oceanward beneath the mesozoic beds. Fig. B. is a sketch from near the south-ea.st 



Pig. B. Serra Comprida from Itabaiana. 



end of Itabaiana peak, looking toward the south-east. The beds of the Serra Com- 

 prida are seen from the inland side, somewhat, and appear to be faulted. 



The Itahaiana Section. 



The accompanying section across the Sergii)e-Alag6as basin is represented as 

 being di-awn from the arcluean region north of the Serra, through Itabaiana, Maroim, 



*See note by Mr. Derby, on p. 378. 



