12 



Annals of the Carnegie Museum. 



south of the venda, known as Camaxo, black bituminous shales are exposed 

 at low water. The following dips were recorded at that place 9° s. 60° w. ; 

 4° s. 80° w. ; 4° s. 33° w. ; 10° s. 50° w. In every instance the dip is toward 

 the hills of the coast. Just south of the stream entering the sea near the 

 village of Japaratuba conglomerates, sandstones, and dark shales are 

 exposed at low tide. They dip s. 80° w., that is, landward. In latitude 

 9° 7' s. in front of the town of Pitingui shales are exposed at low tide with 

 a dip of 9° n. 70° w. and 7° due west. 



Fig. 8. The exposure on the beach at Barreira do Boqueirao. The shaded 

 bed is the fossiliferous shale. 



A bluff further south known as the Barreira do Boqueirao is estimated 

 to be between sixty and seventy meters high. The upper part of this blufT 

 is of red, brown, purple, yellow, and mottled sands and clays. At the 

 base is a bed of black bituminous shales some two or three meters 

 thick, which contains fossil fishes like those found at Riacho Doce. This 

 shale dips n. 40° w. at an angle varying from 10° to 15°. The direction of 

 the dip also varies more or less, but it is always landward, in the direction 

 of the red coast hills. Beneath the shale and conformable with it is a 

 strongly bedded conglomerate and sandstone. 



In the edge of the village of Porto das Pedras in south latitude 9° 10' 

 sandstones with interbedded shales are exposed at the mouth of the Rio 

 Manguaba. These rocks dip toward the southwest at a low angle, perhaps 

 three or four degrees. 



