INVESTIGADORES
CONCHEYRO Graciela Andrea
artículos
Título:
Calcareous Nannofossils from the La Barca Formation (Paleocene/Eocene Boundary), Tierra Del Fuego, Argentina
Autor/es:
BEDOYA AGUDELO, E.L.; OLIVERO, E.; CONCHEYRO, A.; TORRES CARBONELL, P.J; MARTINIONI, D.
Revista:
AMEGHINIANA
Editorial:
ASOCIACION PALEONTOLOGICA ARGENTINA
Referencias:
Lugar: Buenos Aires; Año: 2018 vol. 55 p. 223 - 229
ISSN:
0002-7014
Resumen:
The LO of Fasciculithus alanii and F. richardii, togetherwith the FO of Rhomboaster sp. cf. R. cuspis and Discoaster sp.cf. D. araneus, allow us to assign the age of the LB2 Memberof La Barca Formation to the late Paleocene to early EoceneNP9 Zone (Thanetian?earliest Ypresian), and we use the LOof F. alanii to define the subzone NP9a/NP9b boundary, asin other South Atlantic sections.The identification of the P/E boundary in outcrops of theLB2 Member of the La Barca Formation in Tierra del Fuegoencourages us to perform new detailed samplings in orderto confirm and constrain this stratigraphic boundary.Our results help to improve the biostratigraphic recordof the Paleocene and the Eocene in southern high latitudes,broadening other studies of high-latitude calcareous nannofossilassemblages (e.g. Wise and Wind, 1977; Wise, 1983;Pospichal and Wise, 1990), including those from the Australbasin (e.g. Pérez Panera, 2013).
