66 J. C. BRANNER — GEOLOGY OF NORTHEAST COAST OF BRAZIL 



3. The rocks at Pedras Pretas are trachytes. 



4. Rhyolites form the island of Santo Aleixo, and occur also on the 

 south side of Cabo Santo Agostinho. 



5. The rocks of Cabo Santo Agostinho are chiefly granites, granite- 

 porphyries, and diorite. 



6. The rocks of Pedra do Porto and Pedra do Conde are granites. 



7. The eruptive rocks exposed along the coast are all older than the 

 coast Tertiary deposits. 



8. Thus far the Tertiary rocks along the coast have yielded no fossils, 

 and they are assigned to the Tertiary on the theory that they are the 

 same as the fossiliferous beds at Olinda and Maria Farinha, north of the 

 city of Pernambuco. 



9. The Tertiary sediments have a maximum thickness along this part 

 of the coast of about 75 meters only. 



10. There has been a late elevation of the coast amounting to about 2 

 meters. 



Geology along the Recife ao Sao Francisco Railway and its 

 Prolongation, Sul de Pernambuco * 



railway stations and topography adjacent thereto 



The following is a list of the stations on the Estrada de Ferro Recife 

 ao Sao Francisco, with distances and elevations above sealevel, and also 

 of its prolongation, Sul de Pernambuco : 



Kilometers. 



Station. 



Elevation. 



0.00 

 2.76 



8.72 

 12.27 



24.22 



31.51 



38.36 



45.03 



51.83 



57.67 



63.91 



70.14 



78.29 



86.87 



95.78 



104.02 



113.02 



124.73 



Cinco Pontas (city of Pernambuco) 



Afogados . 



Boa Viagem 



Prazeres 



Pontezinha 



Ilha 



Cabo 



Ipojiica. 



Olinda 



Timbo-Assu 



Escada 



Limoeiro 



Freixeiras 



Aripibii 



Ribeirao 



Gamelleira 



Cuyambuca 



Agua Preta 



Una, or Palmares 



Meters. 

 2.43 

 4.23 



7.75 

 9.80 



2.i6 



13.30 



53.50 



98.50 



96.00 



92.44 



99.60 



124.87 



119.70 



95.60 



90.50 



94.40 



142.86 



120.00 



* The notes on the geology alone this railway were made in five trips over the line east of Una) 

 three trips over the line east of Glycerio, and wo trips over the line as far as Garanhuns. I am 

 especially indebted to Mr Frank Clemetson, acting superintendent, for his kind cooperation in 

 studying the geology along the line of this railway. 



