Darwin forest at Agua de la Zorra: the first in situ forest discovered in South America by Darwin in 1835

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The Agua de la Zorra area (near Uspallata, Mendoza, Argentina) is one of the best renowned fossil localities of the country because of its spectacular in situ fossil forest. This forest was discovered by Charles Darwin in 1835, who described this forest as monotypic and assigned it a Tertiary age. N...

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Autores principales: Brea, Mariana, Artabe, Analía Emilia Eva, Spalletti, Luis Antonio
Formato: Articulo
Lenguaje:Inglés
Publicado: 2009
Materias:
Geología
Palaeovegetation
Palaeoecology
Palaeoenvironments
Middle triassic
Southwest gondwana
Paleovegetación
Paleoecología
Paleoambientes
Triásico Medio
Sudoeste de Gondwana
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/95721
https://ri.conicet.gov.ar/11336/72399
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-95721
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geología
Palaeovegetation
Palaeoecology
Palaeoenvironments
Middle triassic
Southwest gondwana
Paleovegetación
Paleoecología
Paleoambientes
Triásico Medio
Sudoeste de Gondwana
spellingShingle Geología
Palaeovegetation
Palaeoecology
Palaeoenvironments
Middle triassic
Southwest gondwana
Paleovegetación
Paleoecología
Paleoambientes
Triásico Medio
Sudoeste de Gondwana
Brea, Mariana
Artabe, Analía Emilia Eva
Spalletti, Luis Antonio
Darwin forest at Agua de la Zorra: the first in situ forest discovered in South America by Darwin in 1835
topic_facet Geología
Palaeovegetation
Palaeoecology
Palaeoenvironments
Middle triassic
Southwest gondwana
Paleovegetación
Paleoecología
Paleoambientes
Triásico Medio
Sudoeste de Gondwana
description The Agua de la Zorra area (near Uspallata, Mendoza, Argentina) is one of the best renowned fossil localities of the country because of its spectacular in situ fossil forest. This forest was discovered by Charles Darwin in 1835, who described this forest as monotypic and assigned it a Tertiary age. Nowadays, this fossil locality is known as the Darwin Forest. Over a century and a half later it was reinterpreted as a mixed Middle Triassic forest and a new fossil monotypic palaeocommunity of horsetails was discovered. This palaeovegetation is included in the Paramillo Formation (i.e., lower section the Potrerillos Formation) of northwestern Cuyo Basin, Mendoza province (69°12' W and 32°30' S). The sediments were deposited in a sinuous fluvial system, in which channel-filling sand bodies were associated with mud-dominated floodplain deposits. The palaeoforest grew on an Andisol soil that developed on volcaniclastic floodplain deposits. It had a density of 427 -759 trees per hectare, and was constituted by conifers and corystosperms distributed in two arboreal strata. The highest reached 20-26 m tall, and was dominated by corystosperms, but it also included the tallest conifers. The second stratum, mainly composed of conifers, ranged between 16-20 m tall. The forest has also emergent corystosperms, which reached 30 m tall. The understorey was composed of ferns. Growth ring anatomy suggests that conifers could have had an evergreen habit. Structure of vegetation, growth ring analyses and sedimentation suggest that the forest developed under dry, subtropical, and strongly seasonal conditions.
format Articulo
Articulo
author Brea, Mariana
Artabe, Analía Emilia Eva
Spalletti, Luis Antonio
author_facet Brea, Mariana
Artabe, Analía Emilia Eva
Spalletti, Luis Antonio
author_sort Brea, Mariana
title Darwin forest at Agua de la Zorra: the first in situ forest discovered in South America by Darwin in 1835
title_short Darwin forest at Agua de la Zorra: the first in situ forest discovered in South America by Darwin in 1835
title_full Darwin forest at Agua de la Zorra: the first in situ forest discovered in South America by Darwin in 1835
title_fullStr Darwin forest at Agua de la Zorra: the first in situ forest discovered in South America by Darwin in 1835
title_full_unstemmed Darwin forest at Agua de la Zorra: the first in situ forest discovered in South America by Darwin in 1835
title_sort darwin forest at agua de la zorra: the first in situ forest discovered in south america by darwin in 1835
publishDate 2009
url http://sedici.unlp.edu.ar/handle/10915/95721
https://ri.conicet.gov.ar/11336/72399
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