Waring: Geology of Northeastern Brazil. 



213 



at kilns at the eastern base of Serra do Estevao, near Quixada. The 

 limestone proves the presence of at least remnants of the Ceara Series 

 in these two localities. Limestone is also burned near Massape, but 

 the presence in the vicinity of sandstone, which is probably of Cre- 

 taceous age, indicates that the limestone may also belong to this later 

 period. Neither outcrops nor specimens of the limestone were seen 

 by the writer. 



In the northwestern corner of Ceara there is much quartzite in the 

 lower slopes and outliers of the Serra Grande, and the rock is well 

 exposed in the lower land as far northeast as a gorge on Rio Itacolomy, 

 twenty-five kilometers south of Granja. Minor ledges of quartzite 

 or veins of quartz are found nearer to Granja, and at Parazinho, 

 northeast of Granja, there are ledges of white rock, taken by the 

 writer to be veins of quartz, which may be lenticular masses in schists 

 of the Ceara Series. 



Fig. 2. Sketch map, showing the geology in the vicinity of the crystalline 

 limestone masses near Acarape, Ceara. 



Probably the most striking exposures of the Ceara Series in the 

 State from which it is named are formed by crags of limestone near 

 Acarape, about seventy kilometers south of Fortaleza. The approx- 

 imate distribution of the limestone, and its association with quartz, 



