ONSET OF GRASSY HABITATS DURING THE GREENHOUSE–ICEHOUSE SYSTEMS TRANSITION IN THE MIDDLE EOCENE OF CENTRAL PATAGONIA

Authors

  • Alejandro Fabián Zucol CONICET
  • Marcelo J Krause CONICET-Museo Paleontológico Egidio Feruglio, Avenida Fontana 140, U9100GYO Trelew, Chubut, Argentina. Departamento de Geología, Universidad Nacional de la Patagonia San Juan Bosco, Ruta Provincial 1 s/n, (9000) Comodoro Rivadavia, Chubut, Argentina.
  • Mariana Brea Laboratorio de Paleobotánica, Centro de Investigaciones Científicas y Transferencia de Tecnología a la Producción, CICYTTP–CONICET, Dr. Materi y España S/N, E3105BWA Diamante, Entre Ríos, Argentina.
  • M. Sol Raigemborn Centro de Investigaciones Geológicas (CONICET-UNLP), Diagonal 113 # 275, B1904DPK La Plata, Buenos Aires, Argentina.
  • Sergio D Matheos Centro de Investigaciones Geológicas (CONICET-UNLP), Diagonal 113 # 275, B1904DPK La Plata, Buenos Aires, Argentina.

Keywords:

Phytoliths, palaeosols, Koluel-Kaike Formation, palaeoclimate, EECO, Central Patagonia

Abstract

Phytolith assemblages recovered from the middle Eocene Koluel-Kaike Formation in Central Patagonia, southern South America, confirm the presence of herbaceous components, mainly related to mixed ecosystems or savannahs, and subordinate forest communities. This new palaeobotanical information reveals a clear transition between previously described woodland-dominated communities from the early Eocene Las Flores Formation, and grass-rich ecosystems from the mid-Eocene Sarmiento Formation. The early appearance of grass-dominated ecosystems in southern South America, would be related to the worldwide greenhouse to icehouse systems transition initiated during the mid-Palaeogene.

Author Biography

Alejandro Fabián Zucol, CONICET

Investigador de CONICET, Prof U.A.D.E.R.

Published

2018-09-30

How to Cite

Zucol, A. F., Krause, M. J., Brea, M., Raigemborn, M. S., & Matheos, S. D. (2018). ONSET OF GRASSY HABITATS DURING THE GREENHOUSE–ICEHOUSE SYSTEMS TRANSITION IN THE MIDDLE EOCENE OF CENTRAL PATAGONIA. Ameghiniana, 55(4), 451–482. Retrieved from https://ameghiniana.org.ar/index.php/ameghiniana/article/view/3152

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