Milankovitch Hypothesis Supported by Precise Dating of Coral Reefs and Deep-Sea Sediments

  • Wallace S. Broecker
    Lamont Geological Observatory, Columbia University, Palisades, and Queens College, Flushing, New York
  • David L. Thurber
    Lamont Geological Observatory, Columbia University, Palisades, and Queens College, Flushing, New York
  • John Goddard
    Lamont Geological Observatory, Columbia University, Palisades, and Queens College, Flushing, New York
  • Teh-lung Ku
    Department of Chemistry, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts
  • R. K. Matthews
    Department of Geological Sciences, Brown University, Providence, Rhode Island
  • Kenneth J. Mesolella
    Department of Geological Sciences, Brown University, Providence, Rhode Island

抄録

<jats:p> Barbados provides a possibly unique opportunity for reconstruction of the times and elevations of late-Pleistocene high stands of the sea. The island appears to be rising from the sea at a uniform rate that is fast enough to separate in elevation coral-reef tracts formed at successive high stands of the sea. Unaltered coral found in the lower terraces enables high-precision Th <jats:sup>230</jats:sup> : U <jats:sup>234</jats:sup> and Pa <jats:sup>231</jats:sup> : U <jats:sup>235</jats:sup> dating. Three distinct high stands of the sea are found about 122,000, 103,000, and 82,000 years ago. New Pa <jats:sup>231</jats:sup> and Th <jats:sup>230</jats:sup> dates from a deep-sea core also indicate that Ericson's W-X cold-to-warm climatic change occurred close to 126,000 years ago. These data show a parallelism over the last 150,000 years between changes in Earth's climate and changes in the summer insolation predicted from cycles in the tilt and precession of Earth's axis. </jats:p>

収録刊行物

  • Science

    Science 159 (3812), 297-300, 1968-01-19

    American Association for the Advancement of Science (AAAS)

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