532 PROFESSOR J. W. GREGORY. 



Benguella presents an interesting tectonic contrast with East Africa. The rock 

 sequence of the two regions has many points in common, and both have been sub- 

 jected to Kainozoic meridional dislocations. Those of Angola are simple coastal step 

 faults, which have disturbed the Cretaceous limestones. Whether the steps by which 

 the country rises to the plateaus of the interior are due to earth movements of the 

 same age is uncertain. Hence the coastal faults are the only proved representative 

 in Angola of the meridional faults which in East Africa formed the great system of 

 rift valleys. 



REFERENCES. 



1912. Almeida, .Ioao be, Sul d' Angola: Relatorio de um Governo de Distrito (1908-1910), Lisbon, 

 xix + 648 pp., tables and maps. 



1885. Anchikta, Jose ij', "Tra.gos geologicos da Africa occidental portugueza Benguella," reprinted in 



Bol. Soc. Geor/r. Lishoa, vol. v. 

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vol. xviii, pp. 681-701. 

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663, pi. xv. 

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(379-510), pis. xii-xiv. 

 1903. Berg, G., "Gesteine von Angola, Sao Thome und St Helena," Tsch. Min. n. Petrog. Mitt., vol. xxii, 



pp. 357-362. 

 1887. Buchanan, J. Y, "On the Land Slopes separating Continents and Ocean Basins, especially those on 



the West Coast of Africa," Scot. Geog. Mag., vol. iii, pp. 217-238, plate. 

 1877. Cameron, V. Lovett, Across Africa, vol. i, xvi + 389 pp., 15 pis., map ; vol. ii, xii + 366 pp., 18 pis. 

 1882. Capello, Hermeneoulth>, and Ivens, Roberto, From Benguella to the Territory of Yacca: Description 



of a Journey into Central and. West Africa (translated by A. Elwes), vol. i, Hi + 395 pp., map; 



vol. ii, xv + 350 pp., map. 



1886. De Angola a Contra- Costa, vol. i, xxvii + 448 pp., 3 maps; vol. ii, xiii + 490 pp., 3 maps. 



1887. Choffat, P., "Note preliminaire sur les fossiles recueillis par M. Lourengo Malheiro, dans la province 



d'Angola," Hull. Soc. Geo/.. France, ser. 3, vol. xxv, pp. 154-157. . 



1887. "Dos Terrenos Sedimenfcares da Africa Portugueza e Consideragoes sobre a Geologia d'Este 



Continente," Bol. Soe.'Geog. Lisbon, ser. 7 a , pp. 143-150. 



1896. "Coup d'eeil sur la geologic de la province d'Angola," Commnnic. Dir. Trab. Geol. Portugal, 



vol. iii, f. i, pp. 84—91. 

 1900-1901. " Echantillons de roches du district de Mossamedes," Communlc. Dir. Serv. Geol. Portugal, 



vol. iv, pp. 190-194. 

 1905. " Contributions a la con naissance g^ologique des colonies portugaises d'Afrique: II, Nouvelles 



donm'i's sur la zone litforale d'Angola," Commiss. Sere. Geol. Portugal, pp. 31-78, pis. i-iv. 



1888. Ciioffat, P., and de Loriol Lefort, P., " Mat^riaux pour l'etude stratigraphique et paleontologique 



de la proviuce d'Angola," MSm. Soc. Phys. Hid. Ned. Geneue, vol. xxx, No. 2, 116 pp., 8 pis. 

 L894. Cornet, J. (1) " La geologie de la partie sud-est du bassin du Congo et les gisements metalliferes du 



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pp. 193-279, pi. v. 

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