Formation of the Isthmus of Panama.
Sci Adv
; 2(8): e1600883, 2016 08.
Article
en En
| MEDLINE
| ID: mdl-27540590
ABSTRACT
The formation of the Isthmus of Panama stands as one of the greatest natural events of the Cenozoic, driving profound biotic transformations on land and in the oceans. Some recent studies suggest that the Isthmus formed many millions of years earlier than the widely recognized age of approximately 3 million years ago (Ma), a result that if true would revolutionize our understanding of environmental, ecological, and evolutionary change across the Americas. To bring clarity to the question of when the Isthmus of Panama formed, we provide an exhaustive review and reanalysis of geological, paleontological, and molecular records. These independent lines of evidence converge upon a cohesive narrative of gradually emerging land and constricting seaways, with formation of the Isthmus of Panama sensu stricto around 2.8 Ma. The evidence used to support an older isthmus is inconclusive, and we caution against the uncritical acceptance of an isthmus before the Pliocene.
Palabras clave
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Océanos y Mares
/
Evolución Biológica
/
Filogeografía
/
Geología
País/Región como asunto:
America central
/
Panama
Idioma:
En
Revista:
Sci Adv
Año:
2016
Tipo del documento:
Article
País de afiliación:
Panamá