Age of Zinjanthropus: The potassium-argon dates recently obtained from Olduvai Gorge, Tanganyika, raise several questions.
Because some of the Olduvai Gorge dates are inconsistent, some must be inaccurate; they may all be. Until further tests determine which materials give dependable dates, we do not know which dates are accurate. Until this is learned, the indicated ages must be taken cum grano salis.
Straus
W L
WL
Hunt
C B
CB