INVESTIGADORES
BREA Mariana
artículos
Título:
Estudio Comparativo de los leños eocenos de la Formación Río Turbio (Patagonia) y la Formación La Meseta (Antártida): Paleodendroclimatología
Autor/es:
BREA, M.
Revista:
Simposio Paleógeno de América del Sur, Actas. Servicio Geológico Minero Argentino y Instituto de Geología y recursos Minerales
Editorial:
SEGEMAR
Referencias:
Lugar: Buenos Aires; Año: 1999 vol. 33 p. 59 - 65
ISSN:
0328-2325
Resumen:
Growth-rings of woods from the Río Turbio Formation (Eocene), Santa Cruz province, Patagonia, and from the La Meseta Formation (Eocene-Oligocene), Seymour Island (Vicecomodoro Marambio), Antárctica, are compared. Growth-rings of Fagaceae from Río Turbio are wide and uniform, indicating that the environment was favourable for tree growth. These conditions prevailed in the área during part of the Eocene, allowing the development of a community that occupied topographycally high ecological niches. Coniferous wood from the La Meseta Formation has narrow and sensitive growth rings, extremely well defined and shows marked seasonality, indicating that the climate in Seymour Island during the Eocene-Oligocene was unfavourable for tree growth.
