GENERAL AND ECONOMIC GEOLOGY 321 



Arthur Smith Woodward: On a new specimen of the Mesosaurian reptile, 

 Stereosternum tumidum, from Sao Paulo, Brazil. Geological Magazine, 

 April, pages 145-147, 1 plate. London, 1897. 



A. Smith Woodward : Consideragoes sobre alguns peixes Terciarios dos schistos 

 de Taubate, Estado de Sao Paulo, Brazil. Revista do Museu Paulista, vol- 

 ume III, 8°, paginas 63-75. Sao Paulo, 1898. 



A. Smith Woodward: On a tooth of a Triassic Dinosaur from Sao Paulo, 

 Brazil. Report of the British Association for the Advancement of Science 

 for 1909, page 483, 1910. 



J. B. Wood WORTH : Geological expedition to Brazil and Chile — 1908-1909. 

 Bulletin of the Museum of Comparative Zoology, volume LVI, number 1, 

 8°, illustrated, 135 pages. Cambridge, Massachusetts. 



R. Zeiller: Sur un Lepidodendron silicifie du Bresil. Comptes Rendus de 

 I'Academie des Sciences, volume CXXVII, pages 245-247. Paris, 1898. 



SERGIPE 



Previous investigations. — Hartt's Geology and Physical Geography of 

 Brazil contains the first valuable notes on the geology of the State of 

 Sergipe. The general geology of the state was described later in Bran- 

 ner's paper on the geology of the Sergipe-Alagoas basin. That paper was 

 translated into Portuguese and published at Aracajii in 1899. The last 

 important contribution is that of E. H. Soper, whose report is mentioned 

 in the accompanying bibliography. Our knowledge of the geology of that 

 state was also contributed to by Eoderic Crandall^ who, as my assistant, 

 first outlined the geology of the interior of the state in 1908. 



Cretaceous fossils are abundant in the State of Sergipe. The paleon- 

 tology of the state is described in Dr. Chas. A. White's important ^'Con- 

 tributions to the Paleontology of Brazil/^ published as volume VII of the 

 archives of the Museu Nacional of Eio de Janeiro in 1887. 



General geology. — Though Sergipe is a small state, its geology is re- 

 markably comprehensive, and, on account of the accessibility of the rocks 

 and their fossils, it affords the key to the geology of a large part of Brazil. 

 The sequence of the rocks may be seen in the Serra Itabaiana and its 

 prolongations, from the Archean area about the village of Itabaiana to 

 the Tertiary beds near the seacoast. The ages of all of the rocks have not 

 yet been determined with certainty, but it is known that they include 

 representatives of Archean, Paleozoic, Mesozoic, and Cenozoic beds, some 

 of them known to be fossiliferous. The Archean area of the state lies 

 along the Eio Sao Francisco from just above Penedo to above the falls of 

 Paulo Alfonso. The Serra Itabaiana is a monoclinal ridge of quartzites 

 resting on the Archean rocks and dipping eastward toward the ocean. 

 Above the quartzites are limestones, shales, and sandstones that continue 

 up into and through the Upper Cretaceous. Still higher horizontal sedi- 



