390 THE CRETACEOUS AND TEUTIAKY GEOLOGY 



111 the town of Larangeiras is a qiiari-y on the east side of the stream, the 

 rocks having- a general resemblance, lioth in lithologic appearance and in fossils, 

 to the harder portions of the Lastro and Jaqne exposures near Maroim. 



Several outcrops of cretaceous rocks occur along the Cotinguiba, the sti'eam 

 upon which Larangeiras is situated. Above the mouth of the Rio Cajahyba which 

 flows into the Jacaresica from the west, there is a quarry -of white limestone at the 

 Caes da liha on the east bank of the river. A section of about twenty feet of this 

 rock is exposed here. At Oiteiro Galante, on the east side, the same rock shows 

 again in a less prominent exposure. N'either of these places was carefully examined 

 by the writer. 



ESTAKCIA. 



At Estancia the most prominent rock exposures are the red sandstone down 

 which runs the cataract of the Rio Piauhy at this place. In general appearance 

 these beds resemble, in a very striking mannei-, the triassic red sandstones of 'New 

 Jersey, United States, and also those at Penedo on the Rio Sao Francisco. No fos- 

 sils have been found in them. 



Between the city and the port on the river the rocks exposed are dark-brown 

 sandstones varying to conglomerates containing pebbles of gneiss and clay ironstone 

 concretions of various sizes up to six inches in diameter. These rocks have a dip of 

 from two to five degrees to the north-west. I am inclined to think, however, that 

 this is an exposure of tertiary instead of the harder sandstones so well shown in the 

 river. 



At Ribeira Velha are exposures of the tertiary. The locality of especial interest 

 in this neighborhood is a place known as Sao Gongalo, where a few cretaceous fossils 

 were found. The exposure, however, is a very insignificant and unsatisfactory one, 

 where the soft limestones have been dug out for making lime. In this exposure the 

 beds are gently arched, the most prominent dip being to the north-west (?). The 

 uppermost bed is a coarse white sandstone, next below comes a band of line, soft 

 limestone, then gray limestone of a chalky appearance, and at the base a bed of plas- 

 tic blue clay. The quarrymen spoke of having found j^^f-nellas (frying-pans) in the 

 rocks, which, from additional descriptions, were supposed to be large cephalopods. 

 Ko examples, however, were seen. 



THE MARABA SERIES.* 



^riiai the jSIai'aba beds bear the same relation to the mesozoic rocks in the i)ro- 

 vince of Alagoas as do those of Itabaiuna to the mesozoic rocks in Sergipe, there can 



* The l-eira tie Mara1)n is said to l)e the liigliest point in tlie i>rovinc(^ of Alagoas. 



