Climate stability across the Eocene-Oligocene transition, southern Argentina

Mostrar todas las versiones(2)

Fossil mammal teeth from mid-latitude southern Argentina (∼46°S) that closely bracket the Eocene-Oligocene transition show no resolvable change in oxygen isotope compositions. In combination with paleofloral observations and geographic considerations, this finding implies not only that climate was e...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Kohn, Matthew J., Josef, Jennifer A., Madden, Richard H., Kay, Richard F., Vucetich, María Guiomar, Carlini, Alfredo Armando
Formato: Articulo
Lenguaje:Inglés
Publicado: 2004
Materias:
Ciencias Naturales
Eocene-Oligocene transition
stable isotopes
teeth
notoungulates
Argentina
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/138939
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-138939
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Eocene-Oligocene transition
stable isotopes
teeth
notoungulates
Argentina
spellingShingle Ciencias Naturales
Eocene-Oligocene transition
stable isotopes
teeth
notoungulates
Argentina
Kohn, Matthew J.
Josef, Jennifer A.
Madden, Richard H.
Kay, Richard F.
Vucetich, María Guiomar
Carlini, Alfredo Armando
Climate stability across the Eocene-Oligocene transition, southern Argentina
topic_facet Ciencias Naturales
Eocene-Oligocene transition
stable isotopes
teeth
notoungulates
Argentina
description Fossil mammal teeth from mid-latitude southern Argentina (∼46°S) that closely bracket the Eocene-Oligocene transition show no resolvable change in oxygen isotope compositions. In combination with paleofloral observations and geographic considerations, this finding implies not only that climate was essentially constant, despite interpretations elsewhere for major mid- and high-latitude cooling, but also that evolution of hypsodonty did not coincide with climate change during the Eocene-Oligocene transition. One possible explanation for Eocene-Oligocene transition climatic stability is that southern high-latitude cooling increased latitudinal temperature gradients and strengthened ocean circulation gyres, including the southward-flowing Brazil Current in the western South Atlantic. Regionally increased heat transport in the western Atlantic offset global cooling, producing a nearly constant temperature in southern South America. A more radical interpretation, supported by some marine data, is that the paradigm of major global cooling at the Eocene-Oligocene transition is largely false, in that mean sea-surface temperatures changed very little.
format Articulo
Articulo
author Kohn, Matthew J.
Josef, Jennifer A.
Madden, Richard H.
Kay, Richard F.
Vucetich, María Guiomar
Carlini, Alfredo Armando
author_facet Kohn, Matthew J.
Josef, Jennifer A.
Madden, Richard H.
Kay, Richard F.
Vucetich, María Guiomar
Carlini, Alfredo Armando
author_sort Kohn, Matthew J.
title Climate stability across the Eocene-Oligocene transition, southern Argentina
title_short Climate stability across the Eocene-Oligocene transition, southern Argentina
title_full Climate stability across the Eocene-Oligocene transition, southern Argentina
title_fullStr Climate stability across the Eocene-Oligocene transition, southern Argentina
title_full_unstemmed Climate stability across the Eocene-Oligocene transition, southern Argentina
title_sort climate stability across the eocene-oligocene transition, southern argentina
publishDate 2004
url http://sedici.unlp.edu.ar/handle/10915/138939
work_keys_str_mv AT kohnmatthewj climatestabilityacrosstheeoceneoligocenetransitionsouthernargentina
AT josefjennifera climatestabilityacrosstheeoceneoligocenetransitionsouthernargentina
AT maddenrichardh climatestabilityacrosstheeoceneoligocenetransitionsouthernargentina
AT kayrichardf climatestabilityacrosstheeoceneoligocenetransitionsouthernargentina
AT vucetichmariaguiomar climatestabilityacrosstheeoceneoligocenetransitionsouthernargentina
AT carlinialfredoarmando climatestabilityacrosstheeoceneoligocenetransitionsouthernargentina
bdutipo_str Repositorios
_version_ 1764820458152132611

Ejemplares similares