246 



J. C. BEAXXER OUTLIXES OF THE GEOLOGY OF BRAZIL 



series is not certainly known. They are referred tentatively to the lower 

 Permian by Mr. Small, chiefly because beds known to be Permian overlie 

 them on the west. There are several outliers, supposed to be of the same 

 age as the Serra Grande rocks, at and north of Serra da Eola on Eio 

 Acarahii. The rocks of the Serra da Eola itself dip northward, and sev- 

 eral kilometers down the river the dip is to the sonth. There are a good 







^Fiva^lt/Us/bw-cccui^ -^^■ 



VirvctifeT convjxtbrn S\^. 



CcuWnvefv€t^Tivs "branuv -Ag, 



Figure 12. — Cretaceous Fishes from the Serra do Araripe 

 Restored by D. S. Jordan. 



many caves in the limestones of the Serra Grande series, the best known 

 of which is the Grnta de Ubajarra, 13 kilometers northeast of Itiaj^ina, 

 The Serra or Chapada do Araripe, on the southern frontier of Ceara, 

 is a flat-topped tableland of nearly horizontal Cretaceous rocks. The two 

 accompanying sections by Small show the general features of the geology 

 and dispense with the necessity of further description. In the bed called 



