SERIAL PLANKTONIC FORAMINIFERA FROM THE PALEOGENE OF THE TIERRA DEL FUEGO ISLAND, SOUTH AMERICA

Abstract

Research Article| October 01, 2009 SERIAL PLANKTONIC FORAMINIFERA FROM THE PALEOGENE OF THE TIERRA DEL FUEGO ISLAND, SOUTH AMERICA Norberto Malumián; Norberto Malumián 3 1Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina.2Servicio Geológico Minero Argentino, Benjamín Lavaissé 1194, (C1107BJD) Buenos Aires, Argentina. 3Correspondence author. E-mail: n.malumian@yahoo.com Search for other works by this author on: GSW Google Scholar Gabriel Jannou; Gabriel Jannou 2Servicio Geológico Minero Argentino, Benjamín Lavaissé 1194, (C1107BJD) Buenos Aires, Argentina. Search for other works by this author on: GSW Google Scholar Carolina Náñez Carolina Náñez 1Consejo Nacional de Investigaciones Científicas y Técnicas, Argentina.2Servicio Geológico Minero Argentino, Benjamín Lavaissé 1194, (C1107BJD) Buenos Aires, Argentina. Search for other works by this author on: GSW Google Scholar Journal of Foraminiferal Research (2009) 39 (4): 316–321. https://doi.org/10.2113/gsjfr.39.4.316 Article history received: 23 Mar 2009 accepted: 04 May 2009 first online: 03 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 Norberto Malumián, Gabriel Jannou, Carolina Náñez; SERIAL PLANKTONIC FORAMINIFERA FROM THE PALEOGENE OF THE TIERRA DEL FUEGO ISLAND, SOUTH AMERICA. Journal of Foraminiferal Research 2009;; 39 (4): 316–321. doi: https://doi.org/10.2113/gsjfr.39.4.316 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 SocietyJournal of Foraminiferal Research Search Advanced Search Abstract In the lower Paleogene of the Austral (Magallanes) basin, planktonic foraminifera are small and very scarce. Those in the Fuegian Andes, the orogenic margin of the basin, are serial forms that are also relatively minute and generally scarce. These include species of Chiloguembelina coeval with chiloguembelinid abundance peaks in the Atlantic that have been associated with nutrient-enriched waters. The Punta Noguera Formation, which is rich in radiolarians and phosphatic nodules, yielded only two planktonic foraminiferal species, both of Chiloguembelina. One is C. wilcoxensis (Cushman and Ponton), a well-known index species that constrains the minimum age of the unit to the early Eocene. The other, C. noguerensis n. sp., is geographically restricted, and it is distinguished by its test surface that is covered with a conspicuous, irregular reticulation formed of coalescing pustules. In the Fuegian Andes, the triserial planktonic foraminifera Jenkinsina triseriata (Terquem) occurs in the upper lower Eocene section, but there is no record of serial planktonic foraminifera in the middle Eocene, partially due to an unconformity. Higher in the section, upper Eocene strata yield abundant C. ototara in association with Praetenuitella insolita (Jenkins), and Oligocene strata have scarce C. cubensis (Palmer). You do not have access to this content, please speak to your institutional administrator if you feel you should have access.