...ERICK A. BESTLAND; EVELYN S. KRULL Abstract Early Miocene ( c. 18 Ma) hominoid sites (Proconsul) from Rusinga Island, Lake Victoria occur in palaeosols and volcaniclastic strata deposited in a semi-arid, seasonal climate on the flanks of the active, low-relief edifice of the Kisingiri volcano...

...R. E. DRAKE; J. A. VAN COUVERING; M. H. PICKFORD; G. H. CURTIS; J. A. HARRIS Abstract New total-fusion K-Ar ages indicate that all of the fossiliferous formations that make up the lower part of the Early Miocene Kisingiri sequence in western Kenya at Rusinga Island, Mfwangano Island, and Karungu...

...G. Rosatelli; F. Wall; M. J. Le Bas Abstract The ~16 Ma Rangwa Caldera Complex, part of the large Kisingiri nephelinite-carbonatite volcano, Homa Bay District, western Kenya (0°34′S; 34°09′E) contains carbonatitic lapilli and ash tuffs, agglomerate and tuffisite, and a number of intrusive calcite...

... and alluvial aprons that flanked the Miocene volcano of Kisingiri. The braidplain and alluvial apron deposits have primary dips away from the volcano and were derived from material erupted and eroded from the volcano. The Kulu Formation, in contrast, was deposited in two small, elongate lacustrine basins...

... aggradation and pyroclastic airfall in response to volcanism from the nearby Kisingiri volcano. Numerous fining-upward sequences approximately 5 m to 15 m thick make up the bulk of the Kiahera Formation. A complete sequence contains sandy and conglomeratic beds at the base which fine upward to sandy...

.... In western Kenya the volcanoes are associated with the transverse Kavirondo rift. The Kisingiri volcano, to the west, has been eroded to reveal an older complex of intrusive ijolite, uncompahgrite, carbonatite and fenite, pierced by the later pyroclastic vent of Rangwa. This nephelinitic volcano is truncated...

... information was also incorporated from descriptions of holotypes and additional fossil material. Although the taxonomic assignment of the Kisingiri and Tinderet material to the genus Proconsul is rather secure, the potential FAE and LAE for this taxon is somewhat problematic. This is due to some...

... Volcanism 1977 London John Wiley and Sons 169 98 Findlay A. L. Rubie D. C. Le Bas M. J. Kisingiri V: The Rangwa carbonatitic caldera Carbonatite-Nephelinite Volcanism 1977 London John Wiley and Sons 101 8 Flegg A. M. Clarke M. C. G. Sutherland D. S. Le Bas...

... . New chronology for the Early Miocene mammalian faunas of Kisingiri, western Kenya . Journal of the Geological Society, London , 145 : 479 – 491 . Felsenstein , J. 1981 . Evolutionary trees from DNA sequences: a maximum likelihood approach . Journal of Molecular Evolution , 17 : 368...

... the S shore of Lake Victoria and the edge of the rift-Gwasi Hills, Kisingiri, Ruri Hills, Homa Mt. (Saggerson 1952; McCall 1958; King et al. 1972). The Kisingiri volcano, a giant composite cone similar in some respects to the later Timboroa structure, is linked with Mt. Elgon and Napak as the southern...

... volcanic centers of the Western Rift Valley of Africa, such as at Nyiragongo (Congo). In the Eastern Rift Valley, an association is observed principally at the dissected volcanic center of Kisingiri–Rangwa ( Le Bas 1977 ). At Rangwa, melilitolites (uncompahgrite) occur as a significant component...

... from the middle Miocene of Maboko, Kenya : Journal of Mammalian Evolution , v. 19 , p. 57 – 75 . Geraads , D. , Lehmann , T. , Peppe , D.J. , and McNulty , K.P. , 2016 , New Rhinocerotidae from the Kisingiri localities (lower Miocene of Western Kenya) : Journal of Vertebrate...

..., Palaeoclimatology, Palaeoecology 229 , 24 – 39 . Bestland E. A. & Krull E. S. 1999 . Palaeoenvironments of Early Miocene Kisingiri volcano Proconsul sites: evidence from carbon isotopes, palaeosols and hydromagmatic deposits . Journal of the Geological Society, London 156 , 965 –76...

... of Early Miocene Kisingiri volcano Proconsul sites: Evidence from paleosols, carbon isotopes, and hydromagmatic deposits : Geological Society of London, Journal , v. 156 , p. 965 - 976 . Bestland , E.A. , and Retallack , G. J. 1993 , Volcanically influenced calcareous paleosols from...

...), Kerimasi (Hay 1983; Mariano & Roeder 1983), Kisingiri (Le Bas 1977) and Tinderet (Deans & Roberts 1984)-belong to very different successions from that of Kaluwe because they form minor parts of large nephelinite 102 D . C . T U R N E R volcanoes. Apart from the Rufunsa valley province of Zambia where...

... not be applied to high level intrusions but should be confined to the more deeply seated complexes. x x. Fen l t l sa t ion assoc ia ted w i th i jo l i te at K i s ing i r i , western Kenya . By D. C. Rubie, University of Leicester/Edinburgh The Kisingiri Volcano is Tertiary nephelinitic, is 7 ° km in diameter...

.... Le Bas for kindly supplying unpublished data and chips of melilite-bearing rocks from Oka (Canada) and Kisingiri (Kenya), and G. Poli and P. Manetti for allowing the use of unpublished data. The paper benefited from discussions with F. Stoppa, A. Cundari, G. Poli, F. Innocenti, L. Beccaluva, P...

.... , and Krull , E.S. , 1999 , Paleoenvironments of early Miocene Kisingiri volcano Proconsul sites: Evidence from carbon isotopes, paleosols, and hydromagmatic deposits : Geological Society of London Journal , 156 . 965 - 976 . Birkeland , P.W. , 1984 , Soils and geomorphology : New York...

... and evolution . Science 316 : 557 – 558 . Bestland , E. A. , and Krull , E.S. 1999 . Palaeoenvironment of the early Miocene Kisingiri volcano Proconsul sites: evidence from carbon isotopes, palaeosols and hydromagmatic deposits . J. Geol. Soc. Lond. 156 : 965 – 976 . Bogdanova...