CALCAREOUS NANNOFOSSILS FROM LA BARCA FORMATION (PALEOCENE/EOCENE BOUNDARY), TIERRA DEL FUEGO, ARGENTINA

Authors

  • Erika Lorena Bedoya Agudelo Centro Austral de Investigaciones Científicas CADIC-CONICET
  • Eduardo Bernardo Olivero Centro Austral de Investigaciones Científicas Cadic-CONICET; Instituto de ciencias Polares, Ambiente y Recursos Naturales, ICPA-UNTDF
  • Andrea Concheyro Instituto de Estudios Andinos “Don Pablo Groeber” (IDEAN), Universidad de Buenos Aires-CONICET; Instituto Antártico Argentino
  • Pablo Torres Carbonell Centro Austral de Investigaciones Científicas Cadic-CONICET
  • Daniel Roberto Martinioni Centro Austral de Investigaciones Científicas Cadic-CONICET; Instituto de ciencias Polares, Ambiente y Recursos Naturales, ICPA-UNTDF

Keywords:

Austral Basin. Calcareous Nannofossils. Biostratigraphy. PETM. Fuegian Andes

Abstract

The La Barca Formation, an organic-carbon rich sedimentary succession exposed along the Atlantic coast of Península Mitre (Tierra del fuego, Argentina), was initially assigned to the late Paleocene, based on foraminifera and dinocysts. Planktonic foraminifera or calcareous nannofossils were not previously recorded in the two members of this formation. New samples of the upper member provided calcareous nannofossils that correlate with the late Paleocene-early Eocene assemblages in the Southern Hemisphere, spanning nannofossil zones NP9a/NP9b. The Paleocene/Eocene boundary in the La Barca Formation could be placed between the last occurrences of Fasciculithus richardii group and F. alanii, and the first occurrence of Romboaster cf. R. cuspis.

Author Biography

Erika Lorena Bedoya Agudelo, Centro Austral de Investigaciones Científicas CADIC-CONICET

Laboratorio de Geología Andina

Published

2018-05-18

How to Cite

Bedoya Agudelo, E. L., Olivero, E. B., Concheyro, A., Torres Carbonell, P., & Martinioni, D. R. (2018). CALCAREOUS NANNOFOSSILS FROM LA BARCA FORMATION (PALEOCENE/EOCENE BOUNDARY), TIERRA DEL FUEGO, ARGENTINA. Ameghiniana, 55(2), 223–229. Retrieved from https://www.ameghiniana.org.ar/index.php/ameghiniana/article/view/3118

Issue

Section

Paleontological Notes