OP THE SKRGIPE-ALAGOAS BASIN OF BRAZIL. 'ASd 



sidc.'^' The rock liorc is a soft, civam-coloied limestone, in huniuie IVoni one to live 

 ijiches thick, and coming out as flagstones. These flags are extensively used for 

 paving-stones in Aracaju. They dip to the east at an angle varying from 2-5'^ to 

 40°. But few fossils have been found in these rocks, and these have been the scales 

 of fishes. The locality is described also by Prof. Hartt in his "Geology and Physi- 

 cal Geography of Bi-azil," p. o83. 



These Sapucary beds appeal- to be the highest of cretaceous age exposed in this 

 region, the next exposures to the east being coarse, ferruginous sandstones, which, in 

 all probability, belong to the tertiary. If, from Sapucary, one ascends the stream 

 toward Maroim, many cretaceous exposures may be found in the vicinity of Porto da 

 Rede. The rocks to the east of this village are limestones, both hard and soft, many 

 of them containing black flint nodules. They are exposed in many places near the 

 water's edge, along and in the margin of the mangues. The dip is appi-oxiraately 

 to the east at an angle varying from 25° to 35°, None of them form prominent fea- 

 tures in the topography of llu' neighborhood. 



EXPOSUKES ABOUT LARANGEIRAS. 



The most interesting place in the vicinity of Larangeiras is just outside the town, 

 along the road leading to ^Nlaroim. Here hundreds of large cephalopods (mostly 

 Ammonites (JJucJn'ceras) harttii, Hyatt) and echinoderms {Ecldnohrissus freitasii, 

 "White) lie weathered out in the road. Some of these fossils are badly bruised by the 

 wear of travel and their being knocked against one another, while others, more re- 

 cently weathered out, aie fairly well preserved. The material from this locality, and 

 belonging to the Commissao Gcologica was labeled "Bom Jesus'- after the name of 

 the engenho to which the lands belong, and this is the locality referred to in Dr. 

 White's descrii)tions. From this [)oint toward Maroim, at the Engenho I'edra 

 Branca, is a quarry of iuijiiiic limestone dipping southwest. 



A half a mile west of Larangeiras is a place known as ihe Pedra Furada, or 

 pierced rock. A bed of limestone about twenty feet thick is here exposed in an 

 isolated bhiif made pi'ominent by lateral weathering. Litliologically this rock 

 strongly resembles that found at Capoeira and Toque on ilio Sergipe, and of 

 which bed it seems to be the southward extension. The strata dip about S. 45° 

 E. at a low angle. 



♦ Prof. Ilartt gives the name of this place as Sapiicahy, and in Uic notes sent Dr. While liy Mr. Derby on llic 

 geology ot the province of Sergipe tlic name is ao given. Sapucaliy being the name of a Brazilian tree, it is qnile nat- 

 ural that this mistake sliouUl have occurred, and that it should be held as an intelligible word. In spite of this the 

 people at and about the place called it Sapucary, and Ihis, of course, detcrttilDCs its name. 



