The Turonian-Campanian rudist bivalve succession in the Central Iberian Basin
Gil Gil, Javier (Universidad de Alcalá)
Pons, Jose Maria (Universitat Autònoma de Barcelona. Departament de Geologia)
Vicens, Enric (Universitat Autònoma de Barcelona. Departament de Geologia)
García-Hidalgo, José (Universidad de Alcalá)
Segura, Manuel (Universidad de Alcalá)

Date:	2024
Abstract:	Four rudist assemblages: lower Turonian, upper Turonian, upper Coniacian, and Santonian-?Campanian, are distinguished in the shallow water carbonate platform successions of the Iberian Basin, nowadays Iberian Range, a Mesozoic intra-continental basin in the western margin of the Mediterranean Tethys. Because of the depositional evolution of the Iberian Basin, the occurrence, abundance, taxonomic diversity, diagenetic processes, and shell preservation, for each assemblage, is linked, both, to the shallow character of these carbonate platform successions, and the successive high and low frequency sea level falls. Twenty identified rudist taxa are described and figured: Hippuritidae, six species of two genera; Radiolitidae, ten species of six genera, one new, Hoyosites tozoi gen. et sp. nov; Requieniidae, one genus. The knowledge of the shell characters of some taxa has been improved and the taxonomic, biostratigraphic, and palaeobiogeographic significance of most of them increased. The precise positioning of the first three rudist assemblages in high -frequency depositional stacking pattern (parasequence sets) and their correlation and calibration with ammonite biozones provide biostratigraphic datums of great importance. This fact notably improves the chronostratigraphic framework of the Cretaceous sedimentary successions of the Iberian Basin, especially towards the coastal margins, and allows the accurate quantification of the hiatuses associated with the parasequence sets boundaries, so enabling their precise hierarchization.
Grants:	Ministerio de Educación y Ciencia PB96-0676 Ministerio de Educación y Ciencia BTE2003-03606 Ministerio de Educación y Ciencia CGL2004-041133/BTE Ministerio de Educación y Ciencia CGL2007-60054 Ministerio de Educación y Ciencia CGL2009-12008 Ministerio de Educación y Ciencia CGL2011-25581
Note:	Altres ajuts: acords transformatius de la UAB
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Assemblages ; Biostratigraphy ; Iberian Basin ; Taxonomy ; Upper Cretaceous
Published in:	Cretaceous research, Vol. 157 (May 2024) , art. 105815, ISSN 1095-998X

DOI: 10.1016/j.cretres.2023.105815

25 p, 18.8 MB

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