Sergipe, and Alagoas, Brazil. 



621 



is about 15 meters high, and the granite hill to the south 

 extends to and south of the village of Pedras. From this con- 

 tact northward to A racy the road passes over a series of hori- 

 zontal red, brown, and yellow sediments that form a plateau 

 shouldering up against hills of granites and schists on the west. 

 Looking eastward from this place one sees a flat sky-line, 

 while the intervening plain is dotted here and there by outlying 

 peaks and small mountains that were found to be of granite in 

 some cases, and in others remnants of the sedimentary beds. 



Fig. 4. 



Fig. 4. Section at Serra Azul where the Estancia beds rest against crystal- 

 line schists. 



These sedimentary beds are mostly false-bedded sandstones 

 of a dark chocolate color. They and the accompanying shales 

 were hastily examined for fossils, but, with the exception of a 

 few bits of unrecognizable wood, none were found. 



At a place called Serra Azul, about three kilometers south of 

 Aracy, a well was being bored by the federal bureau "Inspec- 

 toria de Obras contra as Seccas." The geology of the place 

 about the well is simple. The well is being sunk in the sedi- 

 mentary beds that rest unconformably against crystalline schists 

 that are exposed in the hills not more than 150 meters south- 

 west of the well. At the time of my visit, June 21, 1911, the 

 well had passed through three meters of sand and one meter of 

 sandrock in place. 



The horizontal Estancia beds continue to within one kilome- 

 ter of Aracy. Here is an outcrop of pink granite just west of 

 the road, but evidently very close to the edge of the sedimen- 

 tary series which underlies the village of Aracy itself. 



The village of Aracy stands upon the Estancia sandstones, 

 and a well has been drilled in the public square. 



Log of the Well of Aracy. 



Clay and soil _ 4-7 meters 



Sandstone 18- " 



Red clay 20- 



Sandstone 4- " 



Total .. 56*7 meters 



