FOSSIL WOODS FROM THE MIDDLE MIOCENE (RÍO CORRENTOSO FORMATION) OF PATAGONIA (NORTHERN SANTA CRUZ PROVINCE, ARGENTINA)

Authors

  • Roberto R. Pujana Museo Argentino de Ciencias Naturales-CONICET, Ángel Gallardo 470, C1405DJR, Ciudad Autónoma de Buenos Aires
  • Inés Aramendía Instituto Patagónico para el Estudio de Ecosistemas Continentales, CCT CONICET-CENPAT, Boulevard Almirante Brown 2915, U9120CD Puerto Madryn, U9120CD, Chubut
  • José I. Cuitiño Instituto Patagónico de Geología y Paleontología, CCT CONICET-CENPAT, Boulevard Almirante Brown 2915, Puerto Madryn, U9120CD, Chubut

DOI:

https://doi.org/10.5710/AMGH.25.02.2020.3284

Keywords:

Wood anatomy, Fossil forests, Conifers, Nothofagaceae, Middle Miocene, Patagonia

Abstract

We collected nine samples from the middle Miocene of Patagonia, in outcrops of the Río Correntoso Formation (Río Zeballos Group) in north Santa Cruz Province, Argentina. Fossil woods have variable preservation and some are poorly preserved. Six samples are silicified, and three are totally carbonized. Two taxonomic units were confidently described, Cupressinoxylon sp., a conifer with Cupressaceae or Podocarpaceae affinity and Nothofagoxylon scalariforme with Nothofagus subgenus Nothofagus affinity of the Nothofagaceae. Other samples are indeterminate angiosperms and conifers. Growth rings of two samples indicate seasonality and galleries with frass and coprolites found in an indeterminate conifer are similar to those made by coleoptera and acari. The assemblage taxonomic composition is similar to other Miocene wood floras of Patagonia with conifers and Nothofagaceae.

Author Biography

Roberto R. Pujana, Museo Argentino de Ciencias Naturales-CONICET, Ángel Gallardo 470, C1405DJR, Ciudad Autónoma de Buenos Aires

Investigador CONICET

Published

2020-08-31

How to Cite

Pujana, R. R., Aramendía, I., & Cuitiño, J. I. (2020). FOSSIL WOODS FROM THE MIDDLE MIOCENE (RÍO CORRENTOSO FORMATION) OF PATAGONIA (NORTHERN SANTA CRUZ PROVINCE, ARGENTINA). Ameghiniana, 57(4), 289–301. https://doi.org/10.5710/AMGH.25.02.2020.3284

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Section

Articles