The Biostratigraphic Analyses of the Faunas of the Nachola Area and Samburu Hills, Northern Kenya

Abstract

To examine and refine the preliminary K-Ar dating results, the faunas of Nachola and Samburu Hills are analyzed biostratigraphically. It is confirmed that the fauna of Nachola is in the pre-Hipparion stage (earlier than 10±0.5 m.y.). The fauna from the Namurungule Formation of Samburu Hills is the post-Hipparion stage (later than 10±0.5), not as advanced as that of Lukeino (6.5 m.y.) and most like those from Ngeringerowa and Nakali. Therefore, it is supposed that the age of the Namurungule fauna is 9±1 m.y..