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Carbonates and Evaporites

, Volume 23, Issue 2, pp 113–116 | Cite as

Geological disconformity found at Bimini, Bahamas, reveals 120K-yr-old land surface at shallow depth

  • W. Harrison
Article
  • 51 Downloads

Abstract

In a 1971 Nature paper (Harrison 1971) entitled “Atlantis Undiscovered — Bimini, Bahamas,” I reported on beachrock, marble, and cement materials lying offshore at shallow depth to the west of North Bimini. I concluded that these materials were too young to reflect a supposed ancient culture. In March 2007, J. Eagle and I cored three exploratory boreholes to 50-ft depths in the Bimini Inlet (Fig. 1). The rocks encountered were far too old to fit with a curve for Holocene sea-level rise in the broader Caribbean (includes the Bahamas). Instead, C-14 and fossil-coral age dating, and stratigraphic information, indicate that a significant disconformity is present beneath the Bimini Islands. A reasonable implication of the missing rocks is that during a period of time covering perhaps 800,000 years — or a minimum of 120,000 years at the least — an ancient land surface in the Bimini area could have been above sea-level during the Pleistocene continental glaciations. This old land surface would have been available for human habitation for upwards of the last 120,000 years, at a minimum.

Keywords

Fossil Coral Solution Channel Bank Margin Subaerial Erosion Reasonable Implication 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Springer 2008

Authors and Affiliations

  • W. Harrison
    • 1
  1. 1.Virginia Beach

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