Los gasterópodos terrestres del Cuaternario Superior de Gran Canaria (Islas Canarias)
- Carolina Castillo Ruiz 1
- M. Ibáñez 1
- María Rosario Esther Alonso Alonso 2
- María Luisa Quesada Álvarez 2
- Julio de la Nuez Pestana 2
- M. J. Valido 3
- J. Cedrés 4
- Trinidad de Torres Pérez-Hidalgo 5
- José Eugenio Ortiz Menéndez 5
- C. García 1
- 1 Dpto. de Biología Animal, Fac. de Biología, Un. de La Laguna
- 2 Dpto. de Edafología y Geología, Fac. de Biología, Un. de La Laguna
- 3 Dirección General de Ordenación e Innovación educativa. Las Palmas de Gran Canaria
- 4 Instituto de Enseñanza Secundaria Lomo de La Herradura. Nicolás Copérnico S/N. Telde. Gran Canaria
- 5 Laboratorio de Estratigrafía Molecular, Escuela Técnica Superior de Ingenieros de Minas de Madrid
ISSN: 1576-5172
Year of publication: 2008
Issue Title: VII Congreso Geológico de España
Issue: 10
Pages: 1253-1256
Type: Article
More publications in: Geotemas (Madrid)
Abstract
A stratigraphic, chronological and paleontological study of eight sedimentary deposits (seven palaeodunes and a colluvial slide) in the Upper Pleistocene of Gran Canaria (Canary Islands) has been undertaken. The palaeodunes are characterized by dune-palaeosoil alternation, from an only cycle in Playa de Jinámar to eleven in Lazareto (Gando). The chronology of these deposits, obtained by amino acid racemisation and 14C datations in Theba genus samples, displays an age between 44,4 Ka and 22,2 Ka. The aminostratigraphy study appoints to these sediments belong to four amino zones (AM2 to AM5) reported by Ortiz et al. (2006). The land snail fossil assemblages are represented by 20 species belonging to eight families, with an endemic degree around 95%. The detected fossil fauna changes with regard to present fauna reveal an Upper Pleistocene species extinction at about 25% and geographic extension decreasing of some species as Theba arinagae and T. aff. grasseti.