I.—The Great Rift Valley, Being the Narrative of a Journey to Mount Kenya and Lake Baringo; with some account of the Geology, Natural History, Anthropology, and Future Prospects of British East Africa. By J. W. Gregory, D.Sc. (Lond.), F.G.S., F.R.G.S., F.Z.S., of the British Museum (Natural History). With Maps and Illustrations. Royal 8vo, pp. xxii and 422. (London, 1896: John Murray. Price 21s.)

1896 ◽  
Vol 3 (7) ◽  
pp. 324-327
Keyword(s):  
Natural History ◽  
East Africa ◽  
Rift Valley ◽  
British Museum ◽  
Future Prospects ◽  
Great Rift Valley

Contributions to the Petrology of British East Africa

1903 ◽  
Vol 13 (61) ◽  
pp. 228-263 ◽  
Author(s):  
G. T. Prior
Keyword(s):  
East Africa ◽  
Rift Valley ◽  
Volcanic Rocks ◽  
Central Africa ◽  
British Museum ◽  
Basaltic Rocks ◽  
Basement Rocks ◽  
Great Rift Valley ◽  
Rock Specimens

The following notes on the petrology of British East Africa are the result of an examination of rock-specimens collected by Professor J. W. Gregory on his well-known expedition from Mombasa to Mt. Kenya and Lake Baringo in 1892-3, and of rock-collections from the Uganda Protectorate which have been recently presented to the British Museum by Sir Harry Johnston.The collections include examples of the Archaean gneisses, schists, and granites which constitute the prevailing basement rocks of Central Africa; of ferruginotls schists, coarse sandstones, and quartzites belonging to the Palaeozoic Karagwe series ; and of an interesting series of Tertiary volcanic rocks comprising phonolites, phonolltic traehytes, riebeckite-rhyolites, kenytes, and basalts from the volcanoes of the Great Rift Valley, as well as of nephelinites and basaltic rocks containing melilite and perofskite from Mr. Elgon.

Etat actuel des connaissances sur le volcan Niragongo (Republique democratique du Congo)

1966 ◽  
Vol S7-VIII (2) ◽  
pp. 176-200 ◽  
Author(s):  
Haroun Tazieff
Keyword(s):  
Chemical Composition ◽  
East Africa ◽  
Gaseous Phase ◽  
Rift Valley ◽  
Accessory Minerals ◽  
République Démocratique Du Congo ◽  
Great Rift Valley

Abstract The Niragongo volcano of the Congo region is located in the western Great Rift Valley in east Africa. The cone is formed of feldspathoidal lavas containing augite and accessory minerals, and the crater contains terraces representing ancient lava levels. Studies were conducted on the chemical composition and petrography of the rocks, on the chemistry of the gases and sublimates, and on the temperature of the lavas. The magnetic and gravimetric values for the volcano and the area were measured and energy discharge was estimated. The study confirmed the importance of the gaseous phase in volcanic phenomena.

Potash-oligoclase from Mt. Erebus, Antarctic, and anorthoclase from Mt. Kenya, East Africa

1925 ◽  
Vol 20 (109) ◽  
pp. 331-345 ◽  
Author(s):  
E. D. Mountain
Keyword(s):  
Natural History ◽  
East Africa ◽  
British Museum ◽  
Terra Nova

A Fine set of loose crystals of felspar from Mt. Erebus was collected by Mr. F. Debenham on the British Antarctic (‘Terra Nova’) Expedition in 1910, and was acquired by the British Museum (Natural History) with the collection of rocks obtained on that voyage. These crystals are found in great profusion on the crater slopes, and their occurrence has been briefly described by David and Priestley, who referred to them as anorthoclase. On ascending the inclined floor of the second crater they saw ‘that the covering of snow became thinner until it almost entirely disappeared, being replaced by a surface formed of crystals of anorthoclase felspar from half an inch to four inches in length’.

Rhipicephalus carnivoralis sp.nov. (Ixodoidea, Ixodidae) A new species of tick from East Africa

Parasitology ◽  
1966 ◽  
Vol 56 (1) ◽  
pp. 1-12 ◽  
Author(s):  
Jane B. Walker
Keyword(s):  
New Species ◽  
Natural History ◽  
East Africa ◽  
East Coast ◽  
British Museum ◽  
Research Organization ◽  
East Coast Fever ◽  
East African ◽  
Veterinary Research ◽  
A New Species

A description is given of the male, female, nymph and larva of Rhipicephalus carnivoralis sp.nov., a parasite of carnivores in East Africa, and its affinities within the genus are discussed.Its developmental periods under laboratory conditions are given and its hosts and distribution in the field are recorded.The author wishes to thank the Director of the East African Veterinary Research Organization for permission to publish this paper. She is also most grateful to all who made field collections of this species for her; to the British Museum (Natural History), London, for the loan of specimens from their collection; to J. P. J. Ross for the loan of specimens from his collection and to D. W. Brocklesby and K. P. Bailey, who carried out the experiments on the transmission of East Coast fever. Dr G. Theiler, Mr G. H. Yeoman, Mr G. M. Kohls, Dr C. M. Clifford and Dr H. Hoogstraal kindly checked the manuscript before publication and made helpful suggestions. Finally, she would like to thank Professor P. C. C. Garnham and Dr Charles Wilcocks for their advice on the name of this tick.

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