33S J. C. Branner — The Tombador Escarpment. 



peaks or sharp ridges of quartzite whose beds stand nearly or 

 quite on end. Tliese quartzite peaks and ridges are more or 

 less isolated, and appear to belong to a series of sediments 

 older than either the jaeobina range or the Tombador range. 



Fig. 3. 



Fig. 3. Serra do Tombador seen from fazeuda Santa Cruz, 

 sketch by the author. 



From a 



As suggested by tbe section and the sketches, the Serra do 

 Tombador is formed by the edges of a resisting sei'ies of nearly 

 horizontal beds. These beds the writer has called the Tom- 

 bador series. They are sandstones and quartzites, and the 

 series is unbroken by intercalated shales. Where the Jacobina- 



FiG. 4. 



Fig. 4. Looking southwest along the east face of the Serra do Tombador 

 from an elevation of 780 meters, and 30 kilometers west of Jaeobina. From 

 a sketch by the author. 



Chiqne Chique road passes the ledge this sandstone series is 

 about a hundred meters thick, and the rocks are rather soft and 

 much jointed, while in color they are pinkish, yellowish, red- 

 dish, and gray. They are strongly false-bedded, and on the 

 top of the serra, where large bare surfaces are exposed and 

 the direction of the lamination is well shown, the false dip is 

 toward the north and northwest. Along the face of the bluffs 

 as seen from the old trail, a couple of kilometers north of the 



