Lower-middle Eocene benthic foraminifera from the Fortuna Section (Betic Cordillera, southeastern Spain)

Abstract

Research Article| January 01, 2006 Lower-middle Eocene benthic foraminifera from the Fortuna Section (Betic Cordillera, southeastern Spain) Silvia Ortiz; Silvia Ortiz 1Departamento de Ciencias de la Tierra, Universidad de Zaragoza, E-50009 Zaragoza, Spain Search for other works by this author on: GSW Google Scholar Ellen Thomas Ellen Thomas 2Center for the Study of Global Change, Department of Geology and Geophysics, Yale University, New Haven, CT 06520-8109, USA, email: silortiz@unizar.es, ellen.thomas@yale.edu Search for other works by this author on: GSW Google Scholar Micropaleontology (2006) 52 (2): 97–150. https://doi.org/10.2113/gsmicropal.52.2.97 Article history received: 17 Jun 2005 accepted: 03 Jan 2006 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Silvia Ortiz, Ellen Thomas; Lower-middle Eocene benthic foraminifera from the Fortuna Section (Betic Cordillera, southeastern Spain). Micropaleontology 2006;; 52 (2): 97–150. doi: https://doi.org/10.2113/gsmicropal.52.2.97 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyMicropaleontology Search Advanced Search Abstract Benthic foraminifera were studied as part of an investigation of the Fortuna Section (Betic Cordillera, Southeastern Spain), undertaken to document a candidate section for the Global Stratotype Section and Point (GSSP) for the base of the Lutetian Stage (Ypresian/Lutetian boundary). Benthic foraminiferal assemblages in this section are mostly dominated by calcareous taxa (~50–96%) and by infaunal morphotypes (~55–88%). The most abundant calcareous taxa are Globobulimina species, Aragonia aragonensis, Cibicidoides species, Osangularia dominicana, and various Lenticulina species. The most common agglutinated species are Clavulinoides angularis, Gaudryina arenata, and Thalmannammina subturbinata. Globobulimina species, A. aragonensis, and C. angularis show strong fluctuations in relative abundances, with a pronounced peak in the relative abundances of Globobulimina species and Aragonia aragonensis, and low species richness across the Ypresian/Lutetian boundary. The occurrence of several peaks in abundance of Globobulimina species suggests that food supply to the benthos fluctuated, and the single peak in abundance of A. aragonensis across the Ypresian/Lutetian boundary might be indicative of a hyperthermal event. Paleodepths inferred from the assemblages range from lower upper bathyal for the lower part of the section to sublitoral for its upper part, and there is no evidence for a sea-level fall at the Ypresian/Lutetian boundary.We selected 82 out of 175 benthic foraminiferal taxa for detailed taxonomic description, based on their relative abundances and/or paleoecological or paleobathymetrical importance. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.