The Kapthurin Formation revisited

Taxonomy and paleoecology of fossil Bovidae (Mammalia, Artiodactyla) from the Kibish Formation, southern Ethiopia: Implications for dietary change, biogeography, and the structure of the living bovid faunas of East Africa

“…A southeast extension of the kob range into central Kenya is also possibly documented from the Middle Pleistocene Kapthurin Formation (Cornelissen et al, 1990). Taken as a whole, these records demonstrate that kob were more widely distributed during the Pleistocene than today.…”

Tephrostratigraphy and the Acheulian to Middle Stone Age transition in the Kapthurin Formation, Kenya

“… -  (Hill et al, 1986), near the top of the Chemeron Formation provides a maximum age for Kapthurin rocks. The entire formation is normally magnetized (Dagley et al, 1978;Cornelissen et al, 1990), indicating that its accumulation postdates 780 ka (Baksi et al, 1992;Cande & Kent, 1992). Previously reported K/Ar results (Cornelissen et al, 1990) indicated an age of 600-900 ka for the lower part of the Kapthurin Formation.…”

“…The entire formation is normally magnetized (Dagley et al, 1978;Cornelissen et al, 1990), indicating that its accumulation postdates 780 ka (Baksi et al, 1992;Cande & Kent, 1992). Previously reported K/Ar results (Cornelissen et al, 1990) indicated an age of 600-900 ka for the lower part of the Kapthurin Formation. A recent program of 40 Ar/ 39 Ar dating has obtained age estimates Figure 2.…”

Pleistocene Palaeoart of Africa

“…This material occurred together with an industry of points, blades and small handaxes of the EMSA (Cornelissen et al 1990 [76,4,5]. About 3% of them show signs of modification by grinding or rubbing, and they are between 270,000 and 170,000 years old.…”