Table 1 Strontium isotope stratigraphy from EWA-1.

From: Vertical motion history of the island of O‘ahu, Hawaiian Islands, during the last two million years

  1. Select corals analyzed with X-ray diffraction (XRD) for % aragonite vs. calcite at Lamont Doherty Earth Observatory, 2σ ranges of uncertainty (“errors”) =  ± 1%, NA = not analyzed. 87Sr/86Sr values given above were corrected for fractionation and adjusted for the NBS987 standard. Total uncertainty error reported above includes combined internal error and long-term NBS987 uncertainties. Shaded values measured at Stony Brook University (NBS987, all others were analyzed at the University of Texas at Austin). EWA1-37 L1* refers to the first wash (see text), thought to be more diagnostic of alteration fluid than the following split (EWA-1-37), and indicates that diagenesis might make samples appear older. An initial bulk rock sample at 247.5 m core depth (87Sr/86Sr = 0.709086 ± 0.000006), taken to assess the feasibility of this study, was not used in the above analysis.
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