Comparison of mid-Cretaceous (Cenomanian–Turonian) high-latitude palynofloras from Patagonia and New Zealand: Richness, ecology, and provincialization

The Cenomanian–Turonian is considered the warmest interval of the last 150 million years. It was characterized by major disturbances to the global carbon cycle, resulting in elevated pCO2 levels and global temperatures, and witnessed the rise to dominance of angiosperms floras. In this paper, we ass...

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Published in:Palaeogeography, Palaeoclimatology, Palaeoecology
Main Authors: Santamarina, Patricio Emmanuel, Barreda, Viviana Dora, Iglesias, Ari, Varela, Augusto Nicolás, Mays, C.
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier Science
Subjects:
Online Access:http://hdl.handle.net/11336/201840
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spelling ftconicet:oai:ri.conicet.gov.ar:11336/201840 2023-10-09T21:47:13+02:00 Comparison of mid-Cretaceous (Cenomanian–Turonian) high-latitude palynofloras from Patagonia and New Zealand: Richness, ecology, and provincialization Santamarina, Patricio Emmanuel Barreda, Viviana Dora Iglesias, Ari Varela, Augusto Nicolás Mays, C. application/pdf http://hdl.handle.net/11336/201840 eng eng Elsevier Science info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0031018222003868 info:eu-repo/semantics/altIdentifier/doi/10.1016/j.palaeo.2022.111216 http://hdl.handle.net/11336/201840 Santamarina, Patricio Emmanuel; Barreda, Viviana Dora; Iglesias, Ari; Varela, Augusto Nicolás; Mays, C.; Comparison of mid-Cretaceous (Cenomanian–Turonian) high-latitude palynofloras from Patagonia and New Zealand: Richness, ecology, and provincialization; Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 604; 10-2022; 1-14 0031-0182 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ CENOMANIAN–TURONIAN NEW ZEALAND PALEOBIOGEOGRAPHY PALEOFLORISTICS PALEOPALYNOLOGY PATAGONIA https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1016/j.palaeo.2022.111216 2023-09-24T20:04:12Z The Cenomanian–Turonian is considered the warmest interval of the last 150 million years. It was characterized by major disturbances to the global carbon cycle, resulting in elevated pCO2 levels and global temperatures, and witnessed the rise to dominance of angiosperms floras. In this paper, we assess changes of fossil floras during the Cenomanian–Turonian interval based on palynological studies of two distantly-spaced localities in high southern paleolatitudes: the Mata Amarilla Formation of Patagonia, southern South America and the Tupuangi Formation of the Chatham Islands, New Zealand. Richness estimations for each stratigraphic unit and cluster analysis were conducted to assess the vegetation changes. Palynological dominance and the presence/absence of taxa were compiled for these units and compared with others from the Cenomanian of southern Gondwana. We recognize a peak in richness during the Mid-Cenomanian Event in Patagonia, with a fall in richness after the event due to species being displaced by dominant taxa. Several richness peaks are also recognized in New Zealand, but the lack of stratigraphic control prevents correlation with marine-based events. Oceanic Anoxic Event 2 is not recorded in either study area. The inclusion of Gondwanic palynological records demonstrate that the Tupuangi Formation cluster with sites from the Antarctic Peninsula and south-eastern Australia conforming a ‘polar cluster’. However, this area has its own palynological signature, constituting a newly proposed Taxodiaceaepollenites Subprovince. The abundances of key plant groups of the Mata Amarilla Formation cluster with those of Bathurst Island (northern Australia), but also show important differences, likely owing to their geographic separation and latitudinal difference. In summary, our paper presents a new scheme for the mid-Cretaceous palynological provinces of Southern Gondwana and provides novel data sets for Patagonia and New Zealand, which can be used as reference points for palynological and paleoecological ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic The Antarctic Antarctic Peninsula Patagonia New Zealand Bathurst Island ENVELOPE(-100.002,-100.002,75.752,75.752) Palaeogeography, Palaeoclimatology, Palaeoecology 604 111216
institution Open Polar
collection CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas)
op_collection_id ftconicet
language English
topic CENOMANIAN–TURONIAN
NEW ZEALAND
PALEOBIOGEOGRAPHY
PALEOFLORISTICS
PALEOPALYNOLOGY
PATAGONIA
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
spellingShingle CENOMANIAN–TURONIAN
NEW ZEALAND
PALEOBIOGEOGRAPHY
PALEOFLORISTICS
PALEOPALYNOLOGY
PATAGONIA
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
Santamarina, Patricio Emmanuel
Barreda, Viviana Dora
Iglesias, Ari
Varela, Augusto Nicolás
Mays, C.
Comparison of mid-Cretaceous (Cenomanian–Turonian) high-latitude palynofloras from Patagonia and New Zealand: Richness, ecology, and provincialization
topic_facet CENOMANIAN–TURONIAN
NEW ZEALAND
PALEOBIOGEOGRAPHY
PALEOFLORISTICS
PALEOPALYNOLOGY
PATAGONIA
https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
description The Cenomanian–Turonian is considered the warmest interval of the last 150 million years. It was characterized by major disturbances to the global carbon cycle, resulting in elevated pCO2 levels and global temperatures, and witnessed the rise to dominance of angiosperms floras. In this paper, we assess changes of fossil floras during the Cenomanian–Turonian interval based on palynological studies of two distantly-spaced localities in high southern paleolatitudes: the Mata Amarilla Formation of Patagonia, southern South America and the Tupuangi Formation of the Chatham Islands, New Zealand. Richness estimations for each stratigraphic unit and cluster analysis were conducted to assess the vegetation changes. Palynological dominance and the presence/absence of taxa were compiled for these units and compared with others from the Cenomanian of southern Gondwana. We recognize a peak in richness during the Mid-Cenomanian Event in Patagonia, with a fall in richness after the event due to species being displaced by dominant taxa. Several richness peaks are also recognized in New Zealand, but the lack of stratigraphic control prevents correlation with marine-based events. Oceanic Anoxic Event 2 is not recorded in either study area. The inclusion of Gondwanic palynological records demonstrate that the Tupuangi Formation cluster with sites from the Antarctic Peninsula and south-eastern Australia conforming a ‘polar cluster’. However, this area has its own palynological signature, constituting a newly proposed Taxodiaceaepollenites Subprovince. The abundances of key plant groups of the Mata Amarilla Formation cluster with those of Bathurst Island (northern Australia), but also show important differences, likely owing to their geographic separation and latitudinal difference. In summary, our paper presents a new scheme for the mid-Cretaceous palynological provinces of Southern Gondwana and provides novel data sets for Patagonia and New Zealand, which can be used as reference points for palynological and paleoecological ...
format Article in Journal/Newspaper
author Santamarina, Patricio Emmanuel
Barreda, Viviana Dora
Iglesias, Ari
Varela, Augusto Nicolás
Mays, C.
author_facet Santamarina, Patricio Emmanuel
Barreda, Viviana Dora
Iglesias, Ari
Varela, Augusto Nicolás
Mays, C.
author_sort Santamarina, Patricio Emmanuel
title Comparison of mid-Cretaceous (Cenomanian–Turonian) high-latitude palynofloras from Patagonia and New Zealand: Richness, ecology, and provincialization
title_short Comparison of mid-Cretaceous (Cenomanian–Turonian) high-latitude palynofloras from Patagonia and New Zealand: Richness, ecology, and provincialization
title_full Comparison of mid-Cretaceous (Cenomanian–Turonian) high-latitude palynofloras from Patagonia and New Zealand: Richness, ecology, and provincialization
title_fullStr Comparison of mid-Cretaceous (Cenomanian–Turonian) high-latitude palynofloras from Patagonia and New Zealand: Richness, ecology, and provincialization
title_full_unstemmed Comparison of mid-Cretaceous (Cenomanian–Turonian) high-latitude palynofloras from Patagonia and New Zealand: Richness, ecology, and provincialization
title_sort comparison of mid-cretaceous (cenomanian–turonian) high-latitude palynofloras from patagonia and new zealand: richness, ecology, and provincialization
publisher Elsevier Science
url http://hdl.handle.net/11336/201840
long_lat ENVELOPE(-100.002,-100.002,75.752,75.752)
geographic Antarctic
The Antarctic
Antarctic Peninsula
Patagonia
New Zealand
Bathurst Island
geographic_facet Antarctic
The Antarctic
Antarctic Peninsula
Patagonia
New Zealand
Bathurst Island
genre Antarc*
Antarctic
Antarctic Peninsula
genre_facet Antarc*
Antarctic
Antarctic Peninsula
op_relation info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0031018222003868
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.palaeo.2022.111216
http://hdl.handle.net/11336/201840
Santamarina, Patricio Emmanuel; Barreda, Viviana Dora; Iglesias, Ari; Varela, Augusto Nicolás; Mays, C.; Comparison of mid-Cretaceous (Cenomanian–Turonian) high-latitude palynofloras from Patagonia and New Zealand: Richness, ecology, and provincialization; Elsevier Science; Palaeogeography, Palaeoclimatology, Palaeoecology; 604; 10-2022; 1-14
0031-0182
CONICET Digital
CONICET
op_rights info:eu-repo/semantics/restrictedAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
op_doi https://doi.org/10.1016/j.palaeo.2022.111216
container_title Palaeogeography, Palaeoclimatology, Palaeoecology
container_volume 604
container_start_page 111216
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