The geology of the Upper Cenozoic sediments in the East Rudolf embayment of the Lake Rudolf basin, Kenya

Bowen, Bruce E.

doi:10.31274/rtd-180814-1241

Cited by 7 publications

(10 citation statements)

References 1 publication

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“…Hemming & Trapnell (1957), Walsh & Dodson (1969), and Dodson (1971) have made observations W of the lake, Robbins (1980) to the SW, and Phillipson (1977) to the SE. Butzer (1971Butzer ( , 1980 has provided valuable data for the Omo region to the N. The Holocene sediments of NE Lake Turkana were first described briefly by Vondra et al (1971) and designated 'Galana Boi Beds' by Bowen & Vondra (1973). Raynolds (1973) described their occurrence E of Koobi Fora.…”

Section: Previous Studies Of the Holocene Sedimentsmentioning

confidence: 99%

Sedimentology, stratigraphy and palaeoenvironments of the Holocene Galana Boi Formation, NE Lake Turkana, Kenya

Owen

Renaut

1986

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Lake Turkana lies in a closed drainage basin at the northern end of the Kenya Rift Valley. During the early and middle Holocene the lake was fresh, much expanded and subject to many fluctuations in surface level, Periodically it formed one linkage in a greater Nile drainage network. Late Holocene, climatically-induced regression left a ring of sediments stranded up to 80 m above the modern lake. To the NE, these deposits are known as the Galana Boi Beds and here we propose raising them to formation status. They consist of diatomaceous silts, silty diatomites, quartz-arenites, arkoses, litharenites, coquinas and at least one air-fall tuff. Depositional environments ranged fiom low-energy offshore, through littoral, lagoonal and deltaic to alluvial and aeolian. A rich, diverse microfossil assemblage of diatoms, pollen and ostracods has been recorded and used in palaeoenvironmental analysis. Macrofossils include molluscs, fish debris and other vertebrates. With their excellent outcrop and diverse environments represented, the Galana Boi Formation can serve as a model for sedimentation of the margins of a large rift lake, and aid in the interpretation of similar, but poorly exposed graben sequences in the geological record.

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Section: Previous Studies Of the Holocene Sedimentsmentioning

confidence: 99%

Sedimentology, stratigraphy and palaeoenvironments of the Holocene Galana Boi Formation, NE Lake Turkana, Kenya

Owen

Renaut

1986

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“…1). Behrensmeyer (1970), Vondra et al (1971), Bowen and Vondra (1973), Bowen (1974), Findlater (1976a,b), and Vondra and Bowen (1976) initially worked on the stratigraphy of Pliocene and Pleistocene deposits in the area. Subsequently, Brown andFeibel (1986, 1991) revised the stratigraphy of the Koobi Fora Formation, principally from work in areas farther south.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, they extended their study to the Suregei highland east of Ileret, and correlated deposits there with units along the eastern basin margin farther south. Bowen (1974) described several sections in the Ileret region in his doctoral dissertation. Fitch and Miller (1970) (also Fitch et al, 1974) provided K/Ar and 40 Ar/ 39 Ar dates on tephra from the region, and Findlater (1976b) discussed correlations to the Ileret region from other parts of East Turkana.…”

Section: Introductionmentioning

confidence: 99%

Stratigraphy of the Koobi Fora Formation (Pliocene and Pleistocene) in the Ileret region of northern Kenya

Gathogo

Brown²

2006

Journal of African Earth Sciences

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Exposures of Pliocene and Pleistocene deposits in the Ileret region include all eight members of the Koobi Fora Formation and represent at least 533 m of section from the base of the Lonyumun Member to the top of the Chari Mb. This thickness is more than twice that reported by earlier workers ($260 m) and compares well with the composite section of the Koobi Fora Formation (525 m). Thus the Ileret region provides a very complete and representative outcrop of the Koobi Fora Formation. As Koobi Fora Formation member boundaries are placed at the base of specified tuffs, not all member boundaries can be recognized in the Ileret region. For this reason, the stratigraphy is described in terms of the following members (thicknesses in parentheses): Lonyumun (110 m), undifferentiated Moiti and Lokochot (104 m), Tulu Bor (54 m), Burgi (55 m), KBS (74 m), Okote (45 m), and Chari (93 m). Moreover, the boundary between the Okote Member and the KBS Member in the Ileret region is placed at a prominent caliche which must closely approximate the age of the Okote Tuff in its type section.

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“…The first stratigraphic classification of the area, also produced by Bowen (1974), has been extensively revised by Brown andFeibel (1986, 1991) due to their work in correlating fluvial tuffaceous deposits across the Turkana basin (Feibel et al, 1989).…”

Section: The Koobi Fora Formationmentioning

confidence: 99%

“…Geologic maps based on aerial photographs of Koobi Fora were first created in the 1970s and 1980s (Bainbridge, 1976;Bowen, 1974;Burggraf, 1976;Frank, 1976;Key and Watkins, 1988;White, 1976). Geologists have used Landsat imagery to map the faults and crystalline rock of Kenya's Gregory Rift, which lies south of Koobi Fora (Vidal, 1988;Tibaldi and Ferrari, 1988).…”

Section: Introductionmentioning

confidence: 99%

Multispectral Thermal Imagery and Its Application to the Geologic Mapping of the Koobi Fora Formation, Northwestern Kenya

Green

2005

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The geology of the Upper Cenozoic sediments in the East Rudolf embayment of the Lake Rudolf basin, Kenya

Cited by 7 publications

References 1 publication

Sedimentology, stratigraphy and palaeoenvironments of the Holocene Galana Boi Formation, NE Lake Turkana, Kenya

Sedimentology, stratigraphy and palaeoenvironments of the Holocene Galana Boi Formation, NE Lake Turkana, Kenya

Stratigraphy of the Koobi Fora Formation (Pliocene and Pleistocene) in the Ileret region of northern Kenya

Multispectral Thermal Imagery and Its Application to the Geologic Mapping of the Koobi Fora Formation, Northwestern Kenya

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