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Fossil Bivalve Shells indicate Longer Month and Year in Cretaceous than Present

Nature volume 217, pages 938–939 (1968)Cite this article

Abstract

ALTHOUGH Wells1 and Scrutton2 suggested methods of studying fossils to determine probable changes in day length, few studies have followed these suggestions. We have examined fossil bivalve shells to try to determine whether the obvious growth lines on the shells are related to tidal or other environmental phenomena. Although the study is continuing, some of the results already obtained are significant.

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References

  1. Wells, J. W., Nature, 197, 948 (1963).

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  2. Scrutton, C. T., Palaeontology, 7, 552 (1964).

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  3. Barker, R. M., Journal of Paleontology (in the press).

  4. Munk, W. H., and MacDonald, G. L. F., The Rotation of the Earth, 250 (Cambridge Univ. Press, 1960).

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Authors and Affiliations

  1. Museum of Paleontology, University of California, Berkeley, California

    WILLIAM B. N. BERRY & RICHARD M. BARKER

Authors
  1. WILLIAM B. N. BERRY
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  2. RICHARD M. BARKER
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BERRY, W., BARKER, R. Fossil Bivalve Shells indicate Longer Month and Year in Cretaceous than Present. Nature 217, 938–939 (1968). https://doi.org/10.1038/217938b0

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