Glomospira Acme During the Paleocene-Eocene Thermal Maximum: Response to CaCO3 Dissolution or to Ecological Forces?

Research Article| January 01, 2013 Glomospira Acme During the Paleocene-Eocene Thermal Maximum: Response to CaCO3 Dissolution or to Ecological Forces? Gabriela J. Arreguîn-Rodrîguez; Gabriela J. Arreguîn-Rodrîguez 4 1 Departamento de Ciencias de la Tierra, Universidad de Zaragoza, 50009 Zaragoza, Spain 4 Correspondence author. E-mail: gjarreguin@gmail.com Search for other works by this author on: GSW Google Scholar Laia Alegret; Laia Alegret 1 Departamento de Ciencias de la Tierra, Universidad de Zaragoza, 50009 Zaragoza, Spain2 Institute Universitario de Investigation en Ciencias Ambientales de Aragon, Universidad de Zaragoza, 50009 Zaragoza, Spain Search for other works by this author on: GSW Google Scholar Silvia Ortiz Silvia Ortiz 3 Departamento de Estratigrafia y Paleontologia, Universidad del Pais Vasco, P.O. Box 644, 48080 Bilbao, Spain Search for other works by this author on: GSW Google Scholar Author and Article Information Gabriela J. Arreguîn-Rodrîguez 4 1 Departamento de Ciencias de la Tierra, Universidad de Zaragoza, 50009 Zaragoza, Spain Laia Alegret 1 Departamento de Ciencias de la Tierra, Universidad de Zaragoza, 50009 Zaragoza, Spain2 Institute Universitario de Investigation en Ciencias Ambientales de Aragon, Universidad de Zaragoza, 50009 Zaragoza, Spain Silvia Ortiz 3 Departamento de Estratigrafia y Paleontologia, Universidad del Pais Vasco, P.O. Box 644, 48080 Bilbao, Spain 4 Correspondence author. E-mail: gjarreguin@gmail.com Publisher: Cushman Foundation for Foraminiferal Research Received: 09 Feb 2012 Accepted: 18 Oct 2012 First Online: 13 Jul 2017 Online ISSN: 1943-264X Print ISSN: 0096-1191 © 2013 Cushman Foundation for Foraminiferal Research Journal of Foraminiferal Research (2013) 43 (1): 40–54. https://doi.org/10.2113/gsjfr.43.1.40 Article history Received: 09 Feb 2012 Accepted: 18 Oct 2012 First Online: 13 Jul 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Gabriela J. Arreguîn-Rodrîguez, Laia Alegret, Silvia Ortiz; Glomospira Acme During the Paleocene-Eocene Thermal Maximum: Response to CaCO3 Dissolution or to Ecological Forces?. Journal of Foraminiferal Research 2013;; 43 (1): 40–54. doi: https://doi.org/10.2113/gsjfr.43.1.40 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 The Paleocene-Eocene Thermal Maximum (PETM) event at ~55.5 Ma, is characterized by globally elevated temperatures, a negative δ13C excursion and major biotic changes on land and in the oceans, including the major extinction of deep-sea benthic foraminifera. Increased acidity of the oceans and associated shallowing of the calcite compensation depth led to dissolution of deep-sea carbonates In various ocean basins during the PETM. As a result, the post-extinction benthic foraminiferal assemblages, which were locally dominated by agglutinated taxa such as Glomospira spp IRepmanina charoides, have been traditionally Interpreted as a result of dissolution of calcareous-shelled species.We carried out a thorough bibliographic revision of the post-extinction assemblages In widely distributed land-based sections and marine cores to: 1) document the paleogeographical extent on the so-called "Glomospira acme," 2) compare the characteristics among sites where the acme is present, and 3) assess the paleoenvironmental conditions that could have potentially controlled the occurrence of the Glomospira acme. We recognized the early Eocene (calcareous plankton biozones NP9 and P5) Glomospira acme in the Tethys and along the eastern margin of the North Atlantic Ocean. The comparison of the sedimentological and paleoenvironmental evolution across the PETM in these areas led us to conclude that the proliferation of Glomospira spp.IR. charoides may have been related not only to CaCO3 dissolution, but also to the pulsed input of siliciclastic material resulting from continental erosion or gravitational fluxes. Increased terrestrial runoff in nearshore-marine sediments is consistent with an enhanced hydrological regime or higher seasonality or episodicity, as previously proposed for the PETM, and with the paleogeographical distribution of the continental margins and slopes In the Tethys and northeast Atlantic region, where the Glomospira acme has been recorded. As a result of the increased siliciclastic Input, low-quality refractory organic matter would be transported to the seafloor, allowing the rapid proliferation of Glomospira spp.IR charoides. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.