Publications des scientifiques de l'IRD

Antoine P. O., Abello M. A., Adnet S., Sierra A. J. A., Baby Patrice, Billet G., Boivin M., Calderon Y., Candela A., Chabain J., Corfu F., Croft D. A., Ganerod M., Jaramillo C., Klaus S., Marivaux L., Navarrete R. E., Orliac M. J., Parra F., Perez M. E., Pujos F., Rage J. C., Ravel A., Robinet C., Roddaz M., Tejada-Lara J. V., Velez-Juarbe J., Wesselingh F. P., Salas-Gismondi R. (2016). A 60-million-year Cenozoic history of western Amazonian ecosystems in Contamana, eastern Peru. Gondwana Research, 31, p. 30-59. ISSN 1342-937X.

Titre du document
A 60-million-year Cenozoic history of western Amazonian ecosystems in Contamana, eastern Peru
Année de publication
2016
Type de document
Article référencé dans le Web of Science WOS:000371555100003
Auteurs
Antoine P. O., Abello M. A., Adnet S., Sierra A. J. A., Baby Patrice, Billet G., Boivin M., Calderon Y., Candela A., Chabain J., Corfu F., Croft D. A., Ganerod M., Jaramillo C., Klaus S., Marivaux L., Navarrete R. E., Orliac M. J., Parra F., Perez M. E., Pujos F., Rage J. C., Ravel A., Robinet C., Roddaz M., Tejada-Lara J. V., Velez-Juarbe J., Wesselingh F. P., Salas-Gismondi R.
Source
Gondwana Research, 2016, 31, p. 30-59 ISSN 1342-937X
We provide a synopsis of similar to 60 million years of life history in Neotropical lowlands, based on a comprehensive survey of the Cenozoic deposits along the Quebrada Cachiyacu near Contamana in Peruvian Amazonia. The 34 fossil bearing localities identified have yielded a diversity of fossil remains, including vertebrates, mollusks, arthropods, plant fossils, and microorganisms, ranging from the early Paleocene to the late Miocene-?Pliocene (>20 successive levels). This Cenozoic series includes the base of the Huchpayacu Formation (Fm.; early Paleocene; lacustrine/fluvial environments; charophyte-dominated assemblage), the Pozo Fm. (middle + ?late Eocene; marine then freshwater environments; most diversified biomes), and complete sections for the Chambira Fm. (late Oligocene-late early Miocene; freshwater environments; vertebrate-dominated faunas), the Pebas Fm. (late early to early late Miocene; freshwater environments with an increasing marine influence; excellent fossil record), and Ipururo Fm. (late Miocene-?Pliocene; fully fluvial environments; virtually no fossils preserved). At least 485 fossil species are recognized in the Contamana area (similar to 250 'plants', similar to 212 animals, and 23 foraminifera). Based on taxonomic lists from each stratigraphic interval, high-level taxonomic diversity remained fairly constant throughout the middle Eocene-Miocene interval (8-12 classes), ordinal diversity fluctuated to a greater degree, and family/species diversity generally declined, with a drastic drop in the early Miocene. The Paleocene-?Pliocene fossil assemblages from Contamana attest at least to four biogeographic histories inherited from (i) Mesozoic Gondwanan times, (ii) the Panamerican realm prior to (iii) the time of South America's Cenozoic "splendid isolation", and (iv) Neotropical ecosystems in the Americas. No direct evidence of any North American terrestrial immigrant has yet been recognized in the Miocene record at Contamana.
Plan de classement
Géologie et formations superficielles [064] ; Etudes, transformation, conservation du milieu naturel [082]
Description Géographique
PEROU ; AMAZONIE ; CONTAMANA
Localisation
Fonds IRD [F B010066660]
Identifiant IRD
fdi:010066660
Contact