IGB

Connexion

(Article of book - 1981)

Document title

Late Pleistocene and Holocene lake level fluctuations in the Lake Bogoria bassin, northern Kenya Rift Valley in Palaeoecology of Africa and the surrounding islands-Vol 13.

Authors(s) and Affiliation(s)

TIERCELIN J. J. ; RENAUT R. W. ; DELIBRIAS G. ; LE FOURNIER J. ; BIEDA S. ; COETZEE J. A. (Editeur scientifique) ; VAN ZINDEREN BAKKER E. M. Sr (Editeur scientifique) ;

Abstract

Lake Bogoria is a closed-basin, saline alkaline lake in the Kenya Rift Valley. The sedimentology and mineralogy of three long drill-cores from the lake floor, and the marginal fluvio-deltaic and littoral deposite are studied here. During the late Pleistocene, the lake fluctuated but was mostly low and saline (anoxic)| calcrete, dolocrete and pedogenic zeolites developed in marginal soils. Following this dry phase, a regional increase in humidity during the terminal Pleistocene and early Holocene, led to a marked rise in lake level. The lake waters were considerably fresher than today allowing expansion of both fauna and flora, and may periodically have overflowed northwards into the Baringo sub-basin. Further fluctuations occured throughout the Holocene. A major late Holocene transgression, dated at c. 4000 BP is recorded by high level, stromatolitic limestone crusts.

Source

Book

ISBN : 90-6191-203-2

Editor : A. A. Balkema, Rotterdam - PAYS-BAS (1981)

Millesime : 1981 [pp. 105-120]

Bibliographic references : 37 réf.

Language

Anglais

Localisation

Bibliothèque du centre de géographie - Paris

Refdoc record number (ud2m) : 12543317 : Permanent link - XML version
Powered by Pxxo