Composición isotópica de gaterópodos en secuencias aluviales holocenas de Bardenas Reales: implicaciones paleoambientales
- Autores: Luis Ángel Ortega Cuesta, Xabier Murelaga Bereicua, Carlos Sancho Marcén, Antonio Muñoz del Viejo, María Cinta Osácar Soriano
- Localización: Geogaceta, ISSN 0213-683X, Nº. 46, 2009, págs. 139-142
- Idioma: español
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Resumen
Stable isotope composition of five species of gastropods from the Late Holocene alluvial record was studied in Bardenas Reales Natural Park (Navarre province) in order to deduce palaeoenvironmental information. Snails shells of five species from three morphosedimentary units (UM2: 4.245±55 to 3.005±55 BP, UM3: 2.745±55 to 925±65 BP and UM4: 210±45 to 85±45 BP) have been analyzed. Mean values of ä18O (V-PDB) and ä13C (V-PDB) are -2.19� and -6.0 for UM2, -1.17� and -6.7 for UM3 and -1.83� and -6.4 for UM4. Variability in isotopic signal among different gastropods species has also been observed.
Changes in ä18O composition are controlled by isotopic composition of meteoric waters and, as a consequence, the warmer and drier environmental conditions during MU3 stage can be inferred.
