Recurrent volcanic activity recorded in araucarian wood from the Lower Cretaceous Springhill Formation, Patagonia, Argentina: Palaeoenvironmental interpretations

This paper describes a petrified trunk collected from a conglomerate bed of the Springhill Formation (Berriasian– Valanginian) in the Estancia El Álamo locality, Santa Cruz Province, Argentina. The fossil trunk is classified within the ubiquitous genus Agathoxylon and the wood anatomy shows a close...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Del Fueyo, Georgina M., Carrizo, Martín A., Poiré, Daniel Gustavo, Lafuente Diaz, Maiten A.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2021
Materias:
Geología
Araucariaceae
Agathoxylon
Volcanic eruptions
Wood
Berriasian
Valanginian
South America
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/118825
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-118825
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Geología
Araucariaceae
Agathoxylon
Volcanic eruptions
Wood
Berriasian
Valanginian
South America
spellingShingle Geología
Araucariaceae
Agathoxylon
Volcanic eruptions
Wood
Berriasian
Valanginian
South America
Del Fueyo, Georgina M.
Carrizo, Martín A.
Poiré, Daniel Gustavo
Lafuente Diaz, Maiten A.
Recurrent volcanic activity recorded in araucarian wood from the Lower Cretaceous Springhill Formation, Patagonia, Argentina: Palaeoenvironmental interpretations
topic_facet Geología
Araucariaceae
Agathoxylon
Volcanic eruptions
Wood
Berriasian
Valanginian
South America
description This paper describes a petrified trunk collected from a conglomerate bed of the Springhill Formation (Berriasian– Valanginian) in the Estancia El Álamo locality, Santa Cruz Province, Argentina. The fossil trunk is classified within the ubiquitous genus Agathoxylon and the wood anatomy shows a close affinity to that of Araucariaceae. This Patagonian wood has a distinct combination of anatomical characteristics unique among all known species from the Jurassic and Cretaceous of Western Gondwana allowing to diagnose a new fossil taxon Agathoxylon mendezii sp. nov. Sedimentological and megafloristic proxies of the Springhill Formation suggest that Agathoxylon mendezii sp. nov. grew under a warm and wet climate, which indicates a subtropical to temperate palaeoenvironment. However, the large number of frost rings in the earlywood of this araucarian tree suggests that the palaeoenvironment at Estancia El Álamo was subjected to recurrent disturbances, most likely caused by regional continuous volcanic activity originating from volcanoes located far away to the west. This activity would have produced periodic stratospheric veils that promoted rapid decreases in surface air temperature; the wood response to such stressful conditions would have been the formation of numerous (at least five) frost rings. Although recurrent eruptions in Patagonia during the Early Cretaceous are well recorded, this study is the first to register eruptions recorded in a coniferous wood.
format Articulo
Articulo
author Del Fueyo, Georgina M.
Carrizo, Martín A.
Poiré, Daniel Gustavo
Lafuente Diaz, Maiten A.
author_facet Del Fueyo, Georgina M.
Carrizo, Martín A.
Poiré, Daniel Gustavo
Lafuente Diaz, Maiten A.
author_sort Del Fueyo, Georgina M.
title Recurrent volcanic activity recorded in araucarian wood from the Lower Cretaceous Springhill Formation, Patagonia, Argentina: Palaeoenvironmental interpretations
title_short Recurrent volcanic activity recorded in araucarian wood from the Lower Cretaceous Springhill Formation, Patagonia, Argentina: Palaeoenvironmental interpretations
title_full Recurrent volcanic activity recorded in araucarian wood from the Lower Cretaceous Springhill Formation, Patagonia, Argentina: Palaeoenvironmental interpretations
title_fullStr Recurrent volcanic activity recorded in araucarian wood from the Lower Cretaceous Springhill Formation, Patagonia, Argentina: Palaeoenvironmental interpretations
title_full_unstemmed Recurrent volcanic activity recorded in araucarian wood from the Lower Cretaceous Springhill Formation, Patagonia, Argentina: Palaeoenvironmental interpretations
title_sort recurrent volcanic activity recorded in araucarian wood from the lower cretaceous springhill formation, patagonia, argentina: palaeoenvironmental interpretations
publishDate 2021
url http://sedici.unlp.edu.ar/handle/10915/118825
work_keys_str_mv AT delfueyogeorginam recurrentvolcanicactivityrecordedinaraucarianwoodfromthelowercretaceousspringhillformationpatagoniaargentinapalaeoenvironmentalinterpretations
AT carrizomartina recurrentvolcanicactivityrecordedinaraucarianwoodfromthelowercretaceousspringhillformationpatagoniaargentinapalaeoenvironmentalinterpretations
AT poiredanielgustavo recurrentvolcanicactivityrecordedinaraucarianwoodfromthelowercretaceousspringhillformationpatagoniaargentinapalaeoenvironmentalinterpretations
AT lafuentediazmaitena recurrentvolcanicactivityrecordedinaraucarianwoodfromthelowercretaceousspringhillformationpatagoniaargentinapalaeoenvironmentalinterpretations
bdutipo_str Repositorios
_version_ 1764820447605555202

Ejemplares similares