Diversity, taphonomy and palaeoecology of an angiosperm flora from the cretaceous (Cenomanian-Coniacian) in Southern Patagonia, Argentina

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This paper describes the diversity, taphonomy and palaeoecology of angiosperm leaves that dominate a palaeoflora of Cretaceous (Cenomanian-Coniacian) age from the Mata Amarilla Formation in the Austral Basin, south-west Patagonia, Argentina. Twelve morphotypes of angiosperm leaves are recognized bas...

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Detalles Bibliográficos
Autores principales: Iglesias, Ari, Zamuner, Alba Berta, Poiré, Daniel Gustavo, Larriestra, Fernando
Formato: Articulo
Lenguaje:Inglés
Publicado: 2007
Materias:
Ciencias Naturales
Paleontología
Angiosperms
Lower Upper Cretaceous
Morphotypes
Palaeoecology
Patagonia
South American floras
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/83011
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-83011
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Paleontología
Angiosperms
Lower Upper Cretaceous
Morphotypes
Palaeoecology
Patagonia
South American floras
spellingShingle Ciencias Naturales
Paleontología
Angiosperms
Lower Upper Cretaceous
Morphotypes
Palaeoecology
Patagonia
South American floras
Iglesias, Ari
Zamuner, Alba Berta
Poiré, Daniel Gustavo
Larriestra, Fernando
Diversity, taphonomy and palaeoecology of an angiosperm flora from the cretaceous (Cenomanian-Coniacian) in Southern Patagonia, Argentina
topic_facet Ciencias Naturales
Paleontología
Angiosperms
Lower Upper Cretaceous
Morphotypes
Palaeoecology
Patagonia
South American floras
description This paper describes the diversity, taphonomy and palaeoecology of angiosperm leaves that dominate a palaeoflora of Cretaceous (Cenomanian-Coniacian) age from the Mata Amarilla Formation in the Austral Basin, south-west Patagonia, Argentina. Twelve morphotypes of angiosperm leaves are recognized based on foliar morphotype analysis of more than 500 specimens. These were divided into six morphological groups based on major architectural patterns. The relative dominance of these morphotypes, mode of preservation and relationship with sedimentary facies were evaluated from two levels within the formation. This analysis identified two different plant palaeocommunities. The lower, María Elena, level (MEL) was deposited in a marine coastal area on a subaerial delta plain; the dominant angiosperm morphotypes preserved in it are group 1 (MA100) and group 2 (MA101, 102); morphotypes MA109 and 110 are scarce but exclusive to this level. The upper, Mata Amarilla, level (MAL), accumulated inland in flood-plain environments; the most abundant angiosperm morphotypes are groups 3 (MA103-105), 4 (MA106) and 1 (MA100); morphotypes MA103-105 and 108 are exclusive to this level. Comparisons with other floras of similar age from Antarctica, Australia and New Zealand indicate that the Mata Amarilla flora has a slightly higher morphological diversity of angiosperm leaves, providing the first evidence for an angiosperm-dominated early Late Cretaceous macroflora in south-west Gondwana.
format Articulo
Articulo
author Iglesias, Ari
Zamuner, Alba Berta
Poiré, Daniel Gustavo
Larriestra, Fernando
author_facet Iglesias, Ari
Zamuner, Alba Berta
Poiré, Daniel Gustavo
Larriestra, Fernando
author_sort Iglesias, Ari
title Diversity, taphonomy and palaeoecology of an angiosperm flora from the cretaceous (Cenomanian-Coniacian) in Southern Patagonia, Argentina
title_short Diversity, taphonomy and palaeoecology of an angiosperm flora from the cretaceous (Cenomanian-Coniacian) in Southern Patagonia, Argentina
title_full Diversity, taphonomy and palaeoecology of an angiosperm flora from the cretaceous (Cenomanian-Coniacian) in Southern Patagonia, Argentina
title_fullStr Diversity, taphonomy and palaeoecology of an angiosperm flora from the cretaceous (Cenomanian-Coniacian) in Southern Patagonia, Argentina
title_full_unstemmed Diversity, taphonomy and palaeoecology of an angiosperm flora from the cretaceous (Cenomanian-Coniacian) in Southern Patagonia, Argentina
title_sort diversity, taphonomy and palaeoecology of an angiosperm flora from the cretaceous (cenomanian-coniacian) in southern patagonia, argentina
publishDate 2007
url http://sedici.unlp.edu.ar/handle/10915/83011
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