Succession of rudistid lithosomes along the western coastal margin of the Iberian Basin (Coniacian, Castrojimeno Section, central Spain)

Javier Gil, Jose Maria Pons, Manuel Segura

Research output: Contribution to journalArticleResearchpeer-review

4 Citations (Scopus)

Abstract

Rudistid lithosomes cropping out near Castrojimeno, at the northern margin of the Central System in north-central Spain, provide detailed information on their composition and structure, on their development and succession, and about their relationship with the Coniacian sequence stratigraphy framework of the Iberian Basin. Most rudist assemblages are oligospecific, with a dominant species, or monospecific. The radiolitids Biradiolites angulosus, Praeradiolites requieni, and Radiolites sauvagesi and the hippuritids Hippurites incisus and Vaccinites giganteus were identified. Radiolitids demonstrate wide intraspecific morphological variability. The following Riding's structural categories of organic reefs are represented: segment reefs, spaced and close cluster reefs, and close cluster/frame reefs. Bioclastic beds of reworked rudist fragments occur below or in between the rudist reefs. The vertical succession of all five types of rudistid lithosomes distinguished evidences a shallowing-upward trend. Rudistid lithosomes developed on the coastal margin during the superposition of the highstand sea-level stage of third- and fourth-order depositional sequences. © Springer-Verlag 2009.
Original languageEnglish
Pages (from-to)523-538
JournalFacies
Volume55
DOIs
Publication statusPublished - 8 May 2009

Keywords

  • Coniacian
  • Iberian basin
  • Rudistid lithosomes
  • Sequence stratigraphy

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