628 



J. C. B fanner — Estancia Beds of Bahia, 



Going south from Morro do Chapeo, by the road leading to 

 Lencoes by way of Antonio Jose, Riachao de Utinga, Bello 

 Horizonte and Pegas, one passes over rocks of the Lavras series 

 and over the Caboclo shales until he reaches the vicinity of 

 fazenda Mulungn where the Rio Utinga and Rio do Burity 

 unite. From there southward appear signs of the Estancia red 

 sandstones and shales and their accompanying limestones. On 

 fazenda Bello Horizonte slabs of shaly limestones are exposed 

 where the road crosses the bridge over Rio de Lages. At 

 Ponte Nova on Rio Utinga there is an exposure of red shale 

 on the right bank of the river about twelve meters above the 

 bridge. 



The beds are nearly horizontal ; the rock is of a dark pur- 

 plish red and has light leached spots through it. It is just 



Fig. 13. 



Fig. 18. Section showing the structure at Mocambo. 



like the red shales seen beneath the limestones at other places. 

 No signs of fossils were found in the shale at Ponte Nova. 



Mr. Waddell of Ponte Nova tells me that limestone out- 

 crops two kilometers east of Rio Utinga, and that it continues 

 for about twenty-five kilometers farther to the east where the 

 road passes onto the granitic rocks of central Bahia. Between 

 Pegas and Rio Bonito the road passes onto the Lavras beds. 

 Traveling southward by way of Lencoes and Andarahy one 

 sees no more of the Estancia series until after Rio Paragurassti 

 is crossed at Bichinho. Near Lagoa do Leite red shales appear 

 by the roadside. West of the lake is a hill that seems to be 

 made of the red shales capped with limestone. 



The general geology at the village of Mocambo is shown in 

 the accompanying section. 



A bluish conglomerate bed exposed at and about Mocambo 

 contains water worn pebbles of the Lavras pink quartzite, and 

 also pebbles of basic eruptive rocks. Overlying the conglom- 

 erate is a series of red shales such as are sometimes found in 

 the Estancia series. 



Following the road southeast from Mocambo toward Ban- 

 deira de Mello loose flints are abundant, apparently weathered 

 out of the limestones above the red shales. At and about 



