Further evidence for a relatively high sea level during the penultimate interglacial: open-system U-series ages from La Marina (Alicante, East Spain)

The elevation and timing of high sea stands during Oxygen Isotope Stage (OIS) 7 are not as well constraíned as those of OIS 5e. Conflictíng values are reported from Medíterranean coastlines, and fossil dating is inaccurate because of ubiquitous open U-series systems. New morphostratigraphic data fro...

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Bibliographic Details
Authors: Goy Goy, José Luis, Hillaire-Marcel, Claude, Zazo Cardeña , Caridad, Bassam, Ghaleb, Dabrio González, Cristino José, González Ureña, Ángel, Bardají Azcárate, Teresa, Civis Llovera, Jorge, Preda, Michael, Yébenes, Alfonso, Forte, Alessandro M.
Format: article
Publication Date:2006
Country:España
Institution:Universidad Complutense de Madrid (UCM)
Repository:Docta Complutense
Language:English
OAI Identifier:oai:docta.ucm.es:20.500.14352/49387
Online Access:https://hdl.handle.net/20.500.14352/49387
Access Level:Open access
Keyword:551.35(460.315)
Oxygen isotopic stage 7
Western Mediterranean
Cladocora caespitosa
"Senegalese" fauna
Neotectonics
Geología estratigráfica
Geodinámica
2506.19 Estratigrafía
2507 Geofísica
Description
Summary:The elevation and timing of high sea stands during Oxygen Isotope Stage (OIS) 7 are not as well constraíned as those of OIS 5e. Conflictíng values are reported from Medíterranean coastlines, and fossil dating is inaccurate because of ubiquitous open U-series systems. New morphostratigraphic data from La Marina (eastem Spain) supported by open-system U-series coral ages shed light on the maximum sea level duríng OIS 7. Fossil corals (Cladocora Caespitosa) underlying an OIS 5e marine unít yielded U-series ages from 178 ± (0 to 208 ± 1) ka (± 20σ n=7) with an outlier al 240 ± 18 ka. Mean open-system limit ages of 170 ± 10 (minimum age after correction for 234Th-230Th uptake) and 237 ± 20 ka (maximum ase after correction for 238U - 234U uptake) were calculated to have a probable age closer to the minimum value, for an assignment of OlS 7a or 7c. The occurrence of a warn-water "Senegalese" fauna (Strombus bubonius) in OIS5e and OIS 7 marine units confirms the arrival of tropical species to the Mediterranean before the last interglacial periodo Morpho-sedimentological and neotectonic studies suggest that the maximum paleo-sea level during OIS 7c or 7a was a few melers below that of OlS Se.

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