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Punctuated Equilibrium Theory and Time: A Case Study in Problems of Coherence in the Measurement of Geological Time (The ‘KBS’ Tuff Controversy and the Dating of Rocks in the Turkana Basin, Kenya)

  • David R. Oldroyd
Part of the Australasian Studies in History and Philosophy of Science book series (AUST, volume 5)

Abstract

The present paper was initially stimulated by attendance at a lecture in Montreal in March 1985 by a young English geologist, Peter G. Williamson, on the results of his researches on Pleistocene shells at a site in Kenya, east of Lake Turkana (formerly Lake Rudolf). Dr. Williamson, who currently holds an appointment at the Agassiz Museum of Comparative Zoology at Harvard University, is a keen exponent of the theory of ’punctuated equilibrium’ in evolutionary biology. In his Montreal lecture, he claimed that his observations in Kenya provided compelling empirical evidence that shell forms could remain largely unchanged for very considerable periods, but could also change rapidly on occasions in a series of ’punctuations’.

Keywords

Rift Valley Fission Track Stratigraphical Column East Lake Punctuate Equilibrium 
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Copyright information

© D. Reidel Publishing Company, Dordrecht, Holland 1987

Authors and Affiliations

  • David R. Oldroyd
    • 1
  1. 1.University of New South WalesAustralia

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