Other
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988e%26psl..90..371e&link_type=abstract
Earth and Planetary Science Letters (ISSN 0012-821X), vol. 90, no. 4, Nov. 25, 1988, p. 371-381. Research supported by the Unive
Other
27
Coral Reefs, Earthquakes, Radioactive Age Determination, Seismology, Accuracy, Pacific Ocean, Thorium Isotopes, Uranium Isotopes
Scientific paper
Three corals from Vanuatu Islands, whose ages were known from counting annual growth bands, were analyzed by Th-230 age analysis to asses the accuracy of the Th-230 method. The comparison of Th-230 ages with the growth-band ages showed that the Th-230 ages were accurate within an error of + or - 3-5 y. Th-230 dates were then determined for two adjacent emerged heads from Santo Island; the dates were the same, indicating that the heads died at the same time, and consistent with the theory that they were killed by coseismic emergence around 1865 AD. The difference between this data and the data of the only major historically documented earthquake that caused an uplift (1973) suggests a seismic recurrence interval of 108 + or - 4 y for Santo. It is suggested that this approach may be extended back in time and to other localities.
Edwards Lawrence R.
Taylor Fred W.
Wasserburg Gerald J.
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