Paleontología de las terrazas marinas del valle de Jorós (Fuerteventura, España)
- José Ángel González Delgado 1
- Caridad Zazo 2
- José Luis Goy Goy 1
- Cristino José Dabrio González 3
- Ana Cabero del Río 2
- Teresa Bardaji Azcárate 4
- Pablo G. Silva Barroso 1
- 1 Dpto. Geología, Universidad de Salamanca
- 2 Museo Nacional de Ciencias Naturales, CSIC.
- 3 Dpto. Estratigrafía, Universidad Complutense de Madrid
- 4 Facultad de Ciencias, Universidad de Alcalá
ISSN: 1576-5172
Année de publication: 2008
Titre de la publication: VII Congreso Geológico de España
Número: 10
Pages: 1265-1268
Type: Article
D'autres publications dans: Geotemas (Madrid)
Résumé
The fossil content of the mainly Pleistocene, marine terraces I, II, III, IV, V, VI, VII and XI from the Jorós Valley (Jandía, Fuerteventura Island) is studied. They differ in the type of outcrop, taphonomic signatures, and diversity and abundance of bivalves, gastropods, corals, cirripeds, calcareous algae, benthic foraminifers and fish tooth, but terraces II and VII are the richest in fossils. Isotopic C and O signals from whole shells of the ostreid Ostrea virleti range from 1,34 to 1,88%o 13CPDB and -0,36 to 0,9%o 18OPDB. Minimal values from O recorded in IV terrace are interpreted as indicative of the highest sea surface temperature. The content of heavier O isotope increases progressively from terraces V to VII, suggesting a moderate decrese of temperature. These features suggest shallow coastal environments for all the studied marine terraces, with sea surface temperatures somewhat higher than the present.