Palaeoenvironments and sedimentology of the Middle Pleistocene Olorgesailie Formation, southern Kenya Rift Valley in Palaeoecology of Africa and the surrounding islands-Vol 13.

Auteurs :
OWEN, R. B.
RENAUT, R. W.
COETZEE, J. A.
VAN ZINDEREN BAKKER, E. M. Sr

Description :
A detailed account is presented of the sediments and diatoms of the Middle Pleistocene Olorgesailie Formation. Facies distributions suggest a lake that was centred on the Koora Graben and which periodically expanded over an area to the north of Mt Olorgesailie. The mineralogy and provenance of the sediments are discussed. The stratigraphic distribution of diatom associations suggest many lake level fluctuations. Alkalinities varied between about 5 and 85 meq/l. Based on alkalinity changes, three main phases in the evolution of the palaeolake can be inferred. The palaeogeography of the southern Kenya Rift and Middle Pleistocene palaeoclimate are briefly considered.


Type de document :
Monographie

Source :
, p. 147-174, Références bibliographiques : 60 réf.

Date :
1981

Identifiants :
isbn : 90-6191-203-2

Editeur :
Pays édition : Pays-Bas, Rotterdam, A. A. Balkema