10 



Annals of the Carnegie Museum. 



down under weathering influences into incoherent sandy clays on steep 

 slopes, or form a hard packed water-shedding layer over horizontal sur- 

 faces. The upper beds, so far as they have been examined, are the soft 

 variousK- colored sandstones, while near the base of the series there are 



Fig. 6. Characteristic topography and false bedding in the coast series nine 

 kilometers north of Lagoa da Jequia. (Crandall phot.) 



black bituminous laminated shales varying in thickness from three to 

 twenty meters. These shales contain lenses and thin interbedded layers 

 of fine sand. Below the shales are sandstones at some places, and below 

 the sandstones are usually conglomerates made up of water-worn boulders 



