Abstract
I.—IN ASIA AND IN AFRICA. PART iv. of vol. xxxviii. of the Records of the Geological Survey of India (1910) contains two papers by Mr. Murray Stuart on the oil-bearing beds of western Prome and Kama, in Lower Burma. Maps and an ideal section are provided. The strata of economic interest, the Kama clays, are of Miocene age, ranging from Burdigalian to Pontian. The author considers the palæontological evidence in some detail, following the determinations of Dr. Noetling. Mr. Cotter treats of part of the Yenangyat oilfield, of which a special map is given. Mr. Datta describes siliceous haematites from Chanda, in the Central Provinces, some of which are already used as iron ores. One would like to hear something of the relations of the lodes to the surrounding rocks, for comparison with similar materials in South Africa. The remainder of part iv. is occupied with the results of Captain R. E. Lloyd's visit to the Aden Hinterland, a country rarely visited. The author was able to travel ninety miles inland along a line due north from Aden, terminating at the town of Dala. Here bedded lavas and ashes cover much of the country, and Mr. Vredenburg (p. 322) suggests that these are representatives of the Deccan Trap. Captain Lloyd shows them to be younger than certain Jurassic strata, and they have been carved out by denudation into plateaus. These lie (p. 317) as much as 6000 feet above sea-level. The volcanic rocks are mostly basalts and dplerites without olivine, in this recalling the Deccan series. A curious rock is described on p. 330, consisting of minute augite prisms in a green ground of devitrified glass, with spherical vesicles infilled by zeolites, triclinic felspar, and epidote. It may be of interest to remark that a precisely similar infilling of vesicles is found in an andesite from Brighton, Massachusetts. Mr. G. H. Tipper describes (p. 336) the Jurassic fossils collected by Captain Lloyd, which agree with a series previously described by Messrs. Newton and Crick as indicating a fairly high horizon. Perisphinctes is the prevailing ammonite.
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C., G. Geological Work in British Lands . Nature 85, 553–555 (1911). https://doi.org/10.1038/085553a0
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DOI: https://doi.org/10.1038/085553a0