Differential Vertical Crustal Movements Deduced from Late Holocene Coral-Rich Conglomerates:  Farquhar and St. Joseph Atolls (Seychelles, Western Indian Ocean)

P. A. Pirazzoli; P. A. Kaplin; L. F. Montaggioni

Differential Vertical Crustal Movements Deduced from Late Holocene Coral-Rich Conglomerates: Farquhar and St. Joseph Atolls (Seychelles, Western Indian Ocean)

Authors

P. A. Pirazzoli
P. A. Kaplin
L. F. Montaggioni

Keywords:

Coral reef, petrological analysis, atoll, Seychelles, Indian Ocean, sea level, vertical movements.

Abstract

Petrological analysis and radiometric dating of samples collected from coral-rich conglomerates in two remote Seychelles atolls suggest differential emergence (1.2 m in Farquhar, 0.8m in St. Joseph) since the almost simultaneous deposition of the conglomerate material, about one thousand years ago. This confirms that tectonically the Seychelles area was relatively unstable during late Quaternary times, as already suggested by a previous study.

Accessibility Summary:

In accordance with Title II regulations this content meets all points of exemption as Archived web content and/or Preexisting conventional electronic documents.

Downloads

Published

1990-04-11

Issue

Vol. 6 No. 2 (1990): Journal of Coastal Research

Section

Articles

License

Authorization for personal use is granted by the Coastal Education and Research Foundation [CERF]. By submitting a manuscript, the authors agree that the copyright for their article is transferred to the publisher if the article is accepted for publication. Assignment of copyright is not required, however, from authors who work for organizations which do not permit such assignment, The copyright covers the exclusive rights to reprduce and distribute the article, inclduing reprints, photographic reproductions, microform, or any other reproductions of a similar nature, and translations.