624 J. C. Branner — Estancia Beds of Bahia, 



Inasmuch as Dr. White's determination of the Permian age 

 of these beds is the iirst one to place them in the geological 

 series by means of fossils, it seems worth while to give, in con- 

 nection with these local notes, such information as I have in 

 regard to the distribution of the Estancia series in Bahia, Ser- 

 gipe and Alagoas. 



It should be kept in mind, in regard to these notes, that 

 there has not been found as yet any paleontologic evidence of 

 the identity of the beds here spoken of as Estancia beds, and 

 that Jacu is the only place where recognizable fossils have been 



Fig. 8. 



. •- ■ M 



Fig. 8. The Estancia red sandstones at fazenda Jaeii near Aracy. 



found. However, the lithologic characters of the series and 

 their relations to other rocks are so constant that there seems 

 to be but little chance of being mistaken about the identity. 



Distribution of the Estancia beds in the State of Bahia. — 

 The approximate area of the Estancia beds in eastern Bahia 

 and Sergipe is shown on the accompanying sketch map (fig. 1). 

 For lack of better maps a more detailed distribution cannot be 

 given at present. It will be seen that the beds extend from 

 the neighborhood of Aracy northward and southward along 

 the westward flank of the Cretaceous-Tertiary table lands. I 

 am not at all sure about how far northward they extend. To 

 the south they have not been certainly recognized as crossing 

 the line of the railway between Serrinha and Alagoinhas, though 

 it is quite possible that they do cross it south of kilometer 103 



