Research-paper
Worldwide correlation of the Pliocene/Pleistocene GSSP at Vrica (Southern Italy) confirmed by strontium isotope stratigraphy
Barbieri, Mario; Castorina, Francesca; Colalongo, Maria Luisa; Pasini, Giancarlo; Vaiani, Stefano Claudio
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Abstract
High-precision measurements of 87Sr/86Sr ratios from foraminifers at the Pliocene/Pleistocene boundary-stratotype section at Vrica (Southern Italy) show moderate variations throughout the section, ranging between 0.709043 and 0.709102. In the two samples closest to the Pliocene/Pleistocene boundary stratotype in which strontium isotopic determinations are available, the 87Sr/86Sr ratio is constrained between 0.709063 ± 12 and 0.709051 ± 8; slightly above, the ratio rises to 0.709089 ± 7. The strontium isotope stratigraphy of the Vrica section is generally in agreement with published data from DSDP/ODP sections and confirms the worldwide correlatability of the Pliocene/Pleistocene boundary-stratotype placed at Vrica, as previously suggested by biostratigraphic and magnetostratigraphic data.