Correction to “Crustal heterogeneity and basement influence on the development of the Kenya Rift, East Africa”

Tectonics ◽  
1993 ◽  
Vol 12 (3) ◽  
pp. 791-793
Author(s):  
Martin Smith ◽  
Peter Mosley
Keyword(s):  
East Africa ◽  
Kenya Rift ◽  
Crustal Heterogeneity

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.

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

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.

Middle–late Miocene palaeoenvironments, palynological data and a fossil fish Lagerstätte from the Central Kenya Rift (East Africa)

2015 ◽  
Vol 154 (1) ◽  
pp. 24-56 ◽  
Author(s):  
CORNELIA RASMUSSEN ◽  
BETTINA REICHENBACHER ◽  
OLAF LENZ ◽  
MELANIE ALTNER ◽  
STEFANIE B. R. PENK ◽  
...  
Keyword(s):  
East Africa ◽  
Late Miocene ◽  
Explosive Volcanism ◽  
Tectonic Activity ◽  
Rift System ◽  
East African Rift System ◽  
Kenya Rift ◽  
Alkaline Lakes ◽  
Palynological Data ◽  
Central Kenya

AbstractThe Miocene epoch was a time of major change in the East African Rift System (EARS) as forest habitats were transformed into grasslands and hominids appeared in the landscape. Here we provide new sedimentological and palynological data on the middle–upper Miocene Ngorora Formation (Tugen Hills, Central Kenya Rift, EARS), together with clay mineral characterizations, mammal finds and a description of the Ngorora fish Lagerstätte. Furthermore, we introduce a revised age ofc. 13.3 Ma for the onset of the Ngorora Formation. The older part of the Ngorora Formation (c. 13.3–12 Ma) records low-energy settings of lakes, floodplains and palaeosols, and evidence of analcime indicates that lakes were alkaline. The palynomorph spectrum consists of tree pollen (Juniperus, Podocarpus), Euphorbiaceae pollen (Acalypha, Croton) and herbaceous pollen of Poaceae and Asteraceae, suggestive of wooded grasslands or grassy woodlands. Alkaline lakes, floodplains and palaeosols continue upsection (c. 12–9 Ma), but environmental fluctuations become more dynamic. Paucity of palynomorphs and the presence of an equid may point to progressively drier conditions. A total of about 500 articulated fish fossils were recovered from distinctive layers of almost all sections studied and represent different lineages of the Haplotilapiines (Pseudocrenilabrinae, Cichlidae). Some of the fish kills may be attributable to rapid water acidification and/or asphyxiation by episodic ash falls. Repeated instances of abrupt change in water depth in many sections are more likely to be due to synsedimentary tectonic activity of the Central Kenya Rift than to climatic variation. Overall, the preservation of the Ngorora fish Lagerstätte resulted from the interplay of tectonics, formation of alkaline lakes and explosive volcanism. As records of grasslands that pre-date late Miocene time are rare, our finding of middle Miocene (12–13 Ma) grassy savannah in the Central Kenya Rift is also relevant to models of human evolution in East Africa.

The anomalously-propagating South Kenya rift in the context of the North Tanzanian Divergence zone, East Africa

2021 ◽  
pp. 228968
Author(s):  
Bernard Le Gall ◽  
Remigius Gama ◽  
Alexander Koptev ◽  
Gilles Chazot ◽  
Nelson Boniface ◽  
...  
Keyword(s):  
East Africa ◽  
Kenya Rift ◽  
The North
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