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



the Estancia beds. They rest upon reddish granites and dip 

 westward beneath the Salitre valley. They are overlain by 

 gray thin-bedded limestones. 



No fossils were found in either the sandstones or the lime- 

 stones though diligent search was made. This section was the 

 first to bring out clearly the relation of limestones of the Sali- 

 tre valley to the Estancia beds. 



Descending from the watershed into the Salitre valley at 

 Yarzinha one finds red shales interbedded with the dove-colored 

 limestones. West of the Salitre valley on fazenda Ingazeira I 

 found red sandstones near the base of the Serra do Angico. 



One and a half kilometers east of the village of Lage where 

 the Riacho do Inferno or Rio Escurial issues from the moun- 

 tains there is a hill of gray thin-bedded limestone 232 meters 



Fig. 11. 



&o.lrh-eVaU 



Fig. 11. General east- west section across Serra de Jacobina through Campo 

 Formoso. The Estancia beds are on the Salitre Valley side and small patches 

 appear on the east side of the watershed. 



high on the south side of the valley that forms the north end 

 of the Serra do Angico. This limestone seems to rest uncon- 

 formable against the sandstones and quartzites of the Serra do 

 Angico and to have sandstones beneath it — probably the 

 Estancia beds. Similar limestones form the hills five kilo- 

 meters west of Lage on both sides of the Rio Escurial. 



Through the region northwest of Lage and as far as the Rio 

 Sao Francisco no beds were seen that could be identified as 

 belonging to the Estancia series. In the Calmon valley, how- 

 ever, are limestones and red sandstones that possibly belong 

 here. 



About the head waters of Rio Salitre and lying between 

 Almas valley and Morro do Chapeo is a great uninhabited cat- 

 inga plain bounded by the Serra de S. Mauricio on the east and 

 by the mountains at Gruna and the Serra do Bautista on the west. 

 Around the margins of this plain appear at many places lime- 

 stones overlying sandstones that seem to belong to the Estancia 

 series. These rocks rest unconformably upon the sandstones 

 and quartzites of the Lavras (Carboniferous ?) series and against 

 the older Caboclo (Devonian ?) shales. 



Some twenty kilometers south of the village of Alagoinhas 

 the red sandstones and limestones are exposed on the trail lead- 

 ing to Gruna. Similar sandstones and limestones were seen 

 near Rodelleiro and in the vicinity of the village of Gruna. 



