Geochemistry of Persististrombus latus Gmelin from the Pleistocene Iberian Mediterranean realm |
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Authors: | TRINIDAD
De TORRES JOSÉ E ORTIZ ISABEL ARRIBAS ANTONIO DELGADO RAMÓN JULIÀ JUAN A MARTÍN‐RUBÍ |
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Institution: | 1. Trinidad de Torres [trinidad.torres@upm.es], José E. Ortiz [joseeugenio.ortiz@upm.es] and Isabel Arribas [isabelkitina.arribas@upm.es], Biomolecular Stratigraphy Laboratory, E.T.S.I. Minas, Universidad Politécnica de Madrid, C/Ríos Rosas 21, 28003 Madrid, Spain;2. Antonio Delgado [antodel@eez.csic.es], Estación Experimental de El Zaidín (CSIC), C/ Profesor Albareda 1, 18008, Granada, Spain;3. Ramón Julià [r.julia@ija.csic.es], Instituto de Ciencias de la Tierra “Jaume Almera” (CSIC), C/ Lluís Solé i Sabarís s/n, 08028 Barcelona, Spain;4. Juan A. Martín‐Rubí [ja.martin@igme.es], Instituto Geológico y Minero de Espa?a, C/Ríos Rosas 23, 28003 Madrid, Spain |
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Abstract: | De Torres, T., Ortiz, J.E., Arribas, I., Delgado, A., Julià, R. & Martín‐Rubí, J.A. 2009: Geochemistry of Persististrombus latus Gmelin from the Pleistocene Iberian Mediterranean realm. Lethaia, Vol. 43, pp. 149–163. In this paper the organic and inorganic geochemistry of fossil and extant Persististrombus latus are compared, together with other strombid species (Lentigo lentiginosus, Lobatus gigas, Strombus alatus, Lobatus raninus, Laevistrombus canarium and Tricornis latissimus). Using a large sample of well‐preserved fossil P. latus shells from the Mediterranean realm, we examined the warming period of sea water in the Middle Pleistocene. A mineralogical study of the shells demonstrates the continuous presence of calcite and a complex organic matter distribution, which was well preserved in many cases, thereby making the U/Th dating of strombid shells unreliable. U/Th analysis of coral samples and amino acid racemization dating of pelecypod shells confirmed that P. latus entered the Mediterranean realm in MIS 7 and 5. The oscillations of the δ18O values reflect annual growth periods and provide a mixing of the first signal record (primary growth) and successive overgrowths. □Amino acid racemization, Mediterranean Sea, Persististrombus latus, shell mineralogy, U/Th, δ18O. |
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