scholarly journals Cenozoic extension in the Kenya Rift from low‐temperature thermochronology: Links to diachronous spatiotemporal evolution of rifting in East Africa

Tectonics ◽  
2015 ◽  
Vol 34 (12) ◽  
pp. 2367-2386 ◽  
Author(s):  
Verónica Torres Acosta ◽  
Alejandro Bande ◽  
Edward R. Sobel ◽  
Mauricio Parra ◽  
Taylor F. Schildgen ◽  
...  
Keyword(s):  
Low Temperature ◽  
East Africa ◽  
Spatiotemporal Evolution ◽  
Kenya Rift

Morphotectonic evolution of the central Kenya rift flanks: Implications for late Cenozoic environmental change in East Africa

Geology ◽  
2007 ◽  
Vol 35 (5) ◽  
pp. 427 ◽  
Author(s):  
Cornelia Spiegel ◽  
Barry P. Kohn ◽  
David X. Belton ◽  
Andrew J.W. Gleadow
Keyword(s):  
Environmental Change ◽  
East Africa ◽  
Late Cenozoic ◽  
Kenya Rift ◽  
Morphotectonic Evolution ◽  
Central Kenya

Pottery Types From Archaeological Sites in East Africa

1961 ◽  
Vol 2 (2) ◽  
pp. 177-198 ◽  
Author(s):  
Merrick Posnansky
Keyword(s):  
East Africa ◽  
Iron Age ◽  
Lake Victoria ◽  
Archaeological Sites ◽  
Kenya Rift ◽  
Late Stone Age ◽  
Relative Dating ◽  
Tobacco Pipes ◽  
Absolute Dating ◽  
Western Uganda

1. The few excavated sites with pottery in East Africa, apart from the coast, are confined to Western Uganda and the Central part of the Kenya Rift Valley.2. Where absolute dating is impossible, relative dating by means of cultural introductions, viz., roulette decoration, the tobacco pipe, calabash pseudomorphs and graphite colouring must be used.3. With the establishment of settled agricultural economies the variation of pottery forms increases.4. An origin of pottery in Kenya cannot be accepted. The first pottery though is that of the Late Stone Age hunter-foodgatherers, and has simple forms.5. The developed Elementeitan, Hyrax Hill and Gumban A wares of Kenya are part of an early, though isolated, complex of possible pre-Iron Age cultures.6. The first true Iron Age pottery, the Dimple-based wares of Kenya and Uganda are part of a common Central African complex.7. The roulette cord decoration appears in East Africa within the present millennium. Lanet, Bigo and Renge pottery wares all owe origins to the introduction.8. The Lanet ware bears similarities to Hottentot pottery of Southern Africa and is dated to the fifteenth to seventeenth centuries.9. Bigo pottery was widespread over Western Uganda around a.d. 1500. Painted wares at chief sites. Basic forms and decoration continue in succeeding Western Uganda Kingdoms. Ritual ware developed.10. Introduction of tobacco pipes, graphite wares and calabash forms by the late seventeenth century.11. Copying of Banyoro graphite wares by neighbouring royal Uganda potters in last quarter of second millennium.12. Evolution of a distinctive pottery, Entebbe Ware, amongst Lake Victoria hunter-fishing peoples.

The Relationship between certain Ant Species with particular Reference to Biological Control of the Coreid, Theraptus sp.

1953 ◽  
Vol 44 (4) ◽  
pp. 669-691 ◽  
Author(s):  
M. J. Way
Keyword(s):  
Biological Control ◽  
Low Temperature ◽  
East Africa ◽  
Coastal Region ◽  
Sandy Soils ◽  
Ground Vegetation ◽  
Oecophylla Longinoda ◽  
Nesting Habits ◽  
Anoplolepis Custodiens ◽  
The Relationship

In the coastal region of British East Africa three ant species, Anoplolepis custodiens, A. longipes and Pheidole punctulata may destroy the ant Oecophylla longinoda which is a valuable predator on the coconut pest Theraptus sp. (Coreidae). The three first-named species do not prey on Theraptus, which may severely damage palms occupied by them.Nesting habits of the three ant species and their behaviour towards O. longinoda and certain other insects are described.O. longinoda has been exterminated in the limited areas occupied by the two Anoplolepis species. P. punctulata is widespread and is usually common in areas occupied by O. longinoda and is also present, though relatively less common, in A. longipes areas.The distribution of the Anoplolepis species, particularly A. custodiens, is correlated with sandy soils bearing a sparse ground vegetation. Where there are heavy soils or a thick ground vegetation of grasses and creepers the Anoplolepis species are absent and O. longinoda is usually present. It is suggested that the Anoplolepis species are limited by the relatively low temperature of soils shaded from sunlight by thick vegetation.

Tectonic and climatic control on evolution of rift lakes in the Central Kenya Rift, East Africa

2009 ◽  
Vol 28 (25-26) ◽  
pp. 2804-2816 ◽  
Author(s):  
A.G.N. Bergner ◽  
M.R. Strecker ◽  
M.H. Trauth ◽  
A. Deino ◽  
F. Gasse ◽  
...  
Keyword(s):  
East Africa ◽  
Kenya Rift ◽  
Climatic Control ◽  
Central Kenya

scholarly journals Progressive aridification in East Africa over the last half million years and implications for human evolution

2018 ◽  
Vol 115 (44) ◽  
pp. 11174-11179 ◽  
Author(s):  
R. Bernhart Owen ◽  
Veronica M. Muiruri ◽  
Tim K. Lowenstein ◽  
Robin W. Renaut ◽  
Nathan Rabideaux ◽  
...  
Keyword(s):  
Climate Change ◽  
East Africa ◽  
Environmental Variability ◽  
Homo Sapiens ◽  
Middle Stone Age ◽  
The South ◽  
Kenya Rift ◽  
Quaternary Climate ◽  
Arid Conditions ◽  
The Impact

Evidence for Quaternary climate change in East Africa has been derived from outcrops on land and lake cores and from marine dust, leaf wax, and pollen records. These data have previously been used to evaluate the impact of climate change on hominin evolution, but correlations have proved to be difficult, given poor data continuity and the great distances between marine cores and terrestrial basins where fossil evidence is located. Here, we present continental coring evidence for progressive aridification since about 575 thousand years before present (ka), based on Lake Magadi (Kenya) sediments. This long-term drying trend was interrupted by many wet–dry cycles, with the greatest variability developing during times of high eccentricity-modulated precession. Intense aridification apparent in the Magadi record took place between 525 and 400 ka, with relatively persistent arid conditions after 350 ka and through to the present. Arid conditions in the Magadi Basin coincide with the Mid-Brunhes Event and overlap with mammalian extinctions in the South Kenya Rift between 500 and 400 ka. The 525 to 400 ka arid phase developed in the South Kenya Rift between the period when the last Acheulean tools are reported (at about 500 ka) and before the appearance of Middle Stone Age artifacts (by about 320 ka). Our data suggest that increasing Middle- to Late-Pleistocene aridification and environmental variability may have been drivers in the physical and cultural evolution of Homo sapiens in East Africa.

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