Diversity, taphonomy and palaeoecology of an angiosperm flora from the cretaceous (Cenomanian-Coniacian) in Southern Patagonia, Argentina
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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ftunivlaplata:oai:sedici.unlp.edu.ar:10915/83011 2023-05-15T13:47:46+02:00 Diversity, taphonomy and palaeoecology of an angiosperm flora from the cretaceous (Cenomanian-Coniacian) in Southern Patagonia, Argentina Iglesias, Ari Zamuner, Alba Berta Poiré, Daniel Gustavo Larriestra, Fernando 2007-03-15 application/pdf 445-466 http://sedici.unlp.edu.ar/handle/10915/83011 en eng Palaeontology vol. 50, no. 2 http://sedici.unlp.edu.ar/handle/10915/83011 issn:0031-0239 http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) CC-BY Ciencias Naturales Paleontología Angiosperms Lower Upper Cretaceous Morphotypes Palaeoecology Patagonia South American floras Articulo 2007 ftunivlaplata 2020-10-04T00:01:41Z 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. Facultad de Ciencias Naturales y Museo Article in Journal/Newspaper Antarc* Antarctica Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual) Argentina Austral New Zealand Patagonia |
institution |
Open Polar |
collection |
Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual) |
op_collection_id |
ftunivlaplata |
language |
English |
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. Facultad de Ciencias Naturales y Museo |
format |
Article in Journal/Newspaper |
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 |
geographic |
Argentina Austral New Zealand Patagonia |
geographic_facet |
Argentina Austral New Zealand Patagonia |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
Palaeontology vol. 50, no. 2 http://sedici.unlp.edu.ar/handle/10915/83011 issn:0031-0239 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) |
op_rightsnorm |
CC-BY |
_version_ |
1766247825944870912 |