woodworth: geological expedition to brazil axd chile. 65 



Signor Cicero de Campos (190S, p. 3) of the Brazilian Geological 

 Service states that between the port of the Indias and Salto-Maua in 

 Parana there outcrops a little below the falls on the left bank of the 

 Rio Tibagy a yellow sandstone with enormous blocks of pink porphyry 

 granite and of porphyry. The fall is caused by basalt. Campos 

 refers the strata of the hilltops to the Carboniferous (Permian?). 



Near the sixty kilometer post on the railway from Ponta Grossa to 

 Porto da L niao I noted an exposure of the compact yellowish beds 

 which appear to be the weathered phase of the tillite as at Conchas. 

 A large boulder was also seen in a cut a short distance north of this 

 locality. 



Boulders and Pebble Beds near Palmeira. — On the divide south of 

 Palmeira yellowish compact beds with blackened joints exhibit a few 

 pebbles north of the 133 km. post. These beds continue in the railway 

 cuts to and somewhat beyond the 130 km. post, then laminated yellow 

 beds come in and a boulder about three feet (1 meter) in diameter 

 appears on the surface west of the track near a house north of 128 km. 

 post, about eleven kms. north of Restinga Secca Station. Large 

 blocks appear in a cut between 122 and 121 km. posts, north of branch 

 road to Amazonas. Beyond 105 km. post, pink pebbly beds are 

 intersected by the railway in the long descent, with tilted pebble 

 bearing beds near 103 km. post. Tilted beds also occur near the 

 ninety-nine km. post, possibly faulted beds. Tamandua Station is 

 at the ninety-three km. post. Beyond this Station pebbles occur in 

 sandstone at eighty-five km. post; again at eighty-three km. post. 

 At seventy-eight km. post there is a good pebble bed and north of 

 seventy-six kms. gravels appear in a cut. 



The Glacial Conglomerate at Serrinha. — At Serrinha in the gorge of 

 the Iguassu, where that river has cut deeply into the sandstones at 

 the southern limits of the sandstone cuesta locally known as the 

 Serrinha (little serra), there is a good exposure of beds, the general 

 characters of which are shown in the annexed unmeasured section, 

 (Fig. 16). 



There is here east and west of the railroad station an exposure of 

 small pebbled conglomerate rising about twenty-fi\e feet above the 

 level of the track. Quartz pebbles either angular or well rounded occur 

 in this bed. with occasional pebbles of gneiss and possibly granite, 

 together with quadrangular fragments of a now reddish friable sand- 

 stone, presimiably a rock derived from underlying beds. East of the 

 station between the 69th and 70th kilometer posts, Dr. Euzebio 

 Oliveira found in the conglomerate beneath the sandstones a dis- 



