...Henning Scholz; Matthias Glaubrecht Abstract New field collections allow the study and description of Valvata juliae new species from the Pliocene upper Burgi Member of the Koobi Fora Formation of Kenya. The shell morphology of this species varies from trochospiral to planispiral to open coiled...

...Ian McDougall; Francis H. Brown Abstract The Plio-Pleistocene Koobi Fora Formation, about 560 m thick, crops out east of Lake Turkana and is part of the much larger depositional system of the Omo–Turkana Basin. The upper half of the Koobi Fora Formation from just below the KBS Tuff to above...

... with the biostratigraphic zonations based on vertebrate and molluscan studies. The sedimentary sequence of the Koobi Fora Formation attains an aggregate thickness of 560 m and spans the period from about 4.3 to 0.6 Ma. Detailed correlations have now been established to relate this sequence to other deposits within...

...IAN MCDOUGALL Abstract In the Koobi Fora region, east of Lake Turkana, northern Kenya, there occurs a sequence ∼500 m thick of lacustrine, fluvial, and deltaic sediments that contains abundant vertebrate fossils, including hominids, as well as stone tools. Rhyolitic tuffs within the sedimentary...

...Andrew S. Cohen Abstract A study of fossil mots and root casts from East Turkana, Kenya, has shown them to be useful paleoenvironmental indicators. Fossil root casts were obtained from the Pleistocene, Upper Member of the Koobi Fora Formation, deposited within the East Turkana Embayment of the Lake...

...A. Vincens GeoRef, Copyright 2004, American Geological Institute. 1979 Africa Angiospermae archaeological sites Cenozoic East Africa East African Lakes Gramineae Kenya Koobi Fora Formation Lake Turkana microfossils miospores Monocotyledoneae palynomorphs Plantae Pleistocene...

.... The new age data on feldspars from the pumice clasts range from 4.02 ± 0.04 Ma for the Naibar Tuff of the Koobi Fora Formation to 1.53 ± 0.02 Ma for Tuff K of the Shungura Formation. The Orange Tuff in the KBS Member of the Koobi Fora Formation was dated at 1.76 ± 0.03 Ma, providing good control...

...Fig. 6.  Stratigraphic relations of tuffs of Group 4, from the Koobi Fora Tuff up to and including the Lokapetamoi Tuff. The section labelled Stern, Area 131 is from Stern (1993) . Others are from field notes of F.H.B. ...

...Figure 2 Composite stratigraphic column for the Koobi Fora Ridge with some key tuff layers, the mollusk (C) and stromatolite (A) marker beds and the samples of the Gabbiella shells and opercula studied herein (column from Feibel, 1999 ). ...

...L. E. Frostick; I. Reid Abstract An analysis of the Koobi Fora Plateau Gravel, N Kenya, reveals clear-cut but contradictory patterns of sedimentary sorting. Basalt particles form the major constituent and decrease in diameter downstream at a rate of 3 mm km -1 , while feldspar is virtually...

...–Pleistocene localities in eastern Africa, Tanzania (Oldupai * (Olduvai) Gorge and Laetoli), Kenya (Allia Bay, Kanapoi, and Koobi Fora), and Ethiopia (Hadar, Woranso-Mille, and Dikika) over the past 75 years of research. E-mail: [email protected] E-mail: [email protected] E...

... of the Nachukui Formation at West Turkana and the Moiti and Lokochot Members of Koobi Fora at East Turkana. It also correlates well with the Mursi Formation and the Basal Member and Member A of the Omo Shungura Formation and the lower portion of the Hadar and Sangantole Formations in the Middle Awash region...