Paleoenvironment of the Cerro Negro Formation (Aptian, Early Cretaceous) of Snow Island, Antarctic Peninsula
Abstract A study of macro and microfacies, palynoflora and palynofacies of the non-marine Cerro Negro Formation at President Head Peninsula, Snow Island, northwest of the Antarctic Peninsula, was developed. Two assemblages were recognized: Palynofacies assemblage 1 (P1) at the base of the section wi...
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2022
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ftdoajarticles:oai:doaj.org/article:31f3932ebae24a2d833c59e7cd583f23 2023-05-15T13:56:24+02:00 Paleoenvironment of the Cerro Negro Formation (Aptian, Early Cretaceous) of Snow Island, Antarctic Peninsula ALESSANDRA SANTOS ENELISE KATIA PIOVESAN JULIANA GUZMÁN CRISTIAN D. USMA LUIZ CARLOS WEINSCHÜTZ RADARANY JASMINE M. DOS SANTOS GUSTAVO R. OLIVEIRA RODRIGO G. FIGUEIREDO JOÃO HENRIQUE Z. RICETTI EVERTON WILNER JULIANA M. SAYÃO ALEXANDER W.A. KELLNER 2022-02-01T00:00:00Z https://doi.org/10.1590/0001-3765202220201944 https://doaj.org/article/31f3932ebae24a2d833c59e7cd583f23 EN eng Academia Brasileira de Ciências http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652022000201201&tlng=en https://doaj.org/toc/1678-2690 1678-2690 doi:10.1590/0001-3765202220201944 https://doaj.org/article/31f3932ebae24a2d833c59e7cd583f23 Anais da Academia Brasileira de Ciências, Vol 94, Iss suppl 1 (2022) Antarctica Cretaceous palynology sedimentology geochemistry Science Q article 2022 ftdoajarticles https://doi.org/10.1590/0001-3765202220201944 2022-12-31T11:13:55Z Abstract A study of macro and microfacies, palynoflora and palynofacies of the non-marine Cerro Negro Formation at President Head Peninsula, Snow Island, northwest of the Antarctic Peninsula, was developed. Two assemblages were recognized: Palynofacies assemblage 1 (P1) at the base of the section with a dominance of fern spores and conifer pollen grains, and facies association consisting of a clastic layer, with the predominance of mudstones; and Palynofacies assemblage 2 (P2) at the top of the section, with remarkable abundance of AOM/Pseudoamorphous particles, associated with facies that includes tuffs. The complete section shows in some levels the presence of freshwater algae and translucent phytoclasts. The integrated data characterizes a fluvial-lacustrine environment, what is reinforced by the occurrence of freshwater algae (Botryococcus) in some levels of P1 and P2. We could verify an increase in volcanic activity towards the top of the section that apparently has played an important role in the collapse of the palynoflora. The occurrence of the spore species Muricingulisporis annulatus, Sotasporites elegans, S. triangularis, Foraminisporis wonthaggiensis, and F. asymmetricus in the Cerro Negro Formation allows the correlation with sections in South America and Australia, suggesting an Aptian age for these deposits. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Snow Island Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic Antarctic Peninsula Cerro Negro ENVELOPE(-61.002,-61.002,-62.655,-62.655) Snow Island ENVELOPE(-61.383,-61.383,-62.776,-62.776) President Head ENVELOPE(-61.202,-61.202,-62.726,-62.726) Anais da Academia Brasileira de Ciências 94 suppl 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Antarctica Cretaceous palynology sedimentology geochemistry Science Q |
spellingShingle |
Antarctica Cretaceous palynology sedimentology geochemistry Science Q ALESSANDRA SANTOS ENELISE KATIA PIOVESAN JULIANA GUZMÁN CRISTIAN D. USMA LUIZ CARLOS WEINSCHÜTZ RADARANY JASMINE M. DOS SANTOS GUSTAVO R. OLIVEIRA RODRIGO G. FIGUEIREDO JOÃO HENRIQUE Z. RICETTI EVERTON WILNER JULIANA M. SAYÃO ALEXANDER W.A. KELLNER Paleoenvironment of the Cerro Negro Formation (Aptian, Early Cretaceous) of Snow Island, Antarctic Peninsula |
topic_facet |
Antarctica Cretaceous palynology sedimentology geochemistry Science Q |
description |
Abstract A study of macro and microfacies, palynoflora and palynofacies of the non-marine Cerro Negro Formation at President Head Peninsula, Snow Island, northwest of the Antarctic Peninsula, was developed. Two assemblages were recognized: Palynofacies assemblage 1 (P1) at the base of the section with a dominance of fern spores and conifer pollen grains, and facies association consisting of a clastic layer, with the predominance of mudstones; and Palynofacies assemblage 2 (P2) at the top of the section, with remarkable abundance of AOM/Pseudoamorphous particles, associated with facies that includes tuffs. The complete section shows in some levels the presence of freshwater algae and translucent phytoclasts. The integrated data characterizes a fluvial-lacustrine environment, what is reinforced by the occurrence of freshwater algae (Botryococcus) in some levels of P1 and P2. We could verify an increase in volcanic activity towards the top of the section that apparently has played an important role in the collapse of the palynoflora. The occurrence of the spore species Muricingulisporis annulatus, Sotasporites elegans, S. triangularis, Foraminisporis wonthaggiensis, and F. asymmetricus in the Cerro Negro Formation allows the correlation with sections in South America and Australia, suggesting an Aptian age for these deposits. |
format |
Article in Journal/Newspaper |
author |
ALESSANDRA SANTOS ENELISE KATIA PIOVESAN JULIANA GUZMÁN CRISTIAN D. USMA LUIZ CARLOS WEINSCHÜTZ RADARANY JASMINE M. DOS SANTOS GUSTAVO R. OLIVEIRA RODRIGO G. FIGUEIREDO JOÃO HENRIQUE Z. RICETTI EVERTON WILNER JULIANA M. SAYÃO ALEXANDER W.A. KELLNER |
author_facet |
ALESSANDRA SANTOS ENELISE KATIA PIOVESAN JULIANA GUZMÁN CRISTIAN D. USMA LUIZ CARLOS WEINSCHÜTZ RADARANY JASMINE M. DOS SANTOS GUSTAVO R. OLIVEIRA RODRIGO G. FIGUEIREDO JOÃO HENRIQUE Z. RICETTI EVERTON WILNER JULIANA M. SAYÃO ALEXANDER W.A. KELLNER |
author_sort |
ALESSANDRA SANTOS |
title |
Paleoenvironment of the Cerro Negro Formation (Aptian, Early Cretaceous) of Snow Island, Antarctic Peninsula |
title_short |
Paleoenvironment of the Cerro Negro Formation (Aptian, Early Cretaceous) of Snow Island, Antarctic Peninsula |
title_full |
Paleoenvironment of the Cerro Negro Formation (Aptian, Early Cretaceous) of Snow Island, Antarctic Peninsula |
title_fullStr |
Paleoenvironment of the Cerro Negro Formation (Aptian, Early Cretaceous) of Snow Island, Antarctic Peninsula |
title_full_unstemmed |
Paleoenvironment of the Cerro Negro Formation (Aptian, Early Cretaceous) of Snow Island, Antarctic Peninsula |
title_sort |
paleoenvironment of the cerro negro formation (aptian, early cretaceous) of snow island, antarctic peninsula |
publisher |
Academia Brasileira de Ciências |
publishDate |
2022 |
url |
https://doi.org/10.1590/0001-3765202220201944 https://doaj.org/article/31f3932ebae24a2d833c59e7cd583f23 |
long_lat |
ENVELOPE(-61.002,-61.002,-62.655,-62.655) ENVELOPE(-61.383,-61.383,-62.776,-62.776) ENVELOPE(-61.202,-61.202,-62.726,-62.726) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Cerro Negro Snow Island President Head |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Cerro Negro Snow Island President Head |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Snow Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Snow Island |
op_source |
Anais da Academia Brasileira de Ciências, Vol 94, Iss suppl 1 (2022) |
op_relation |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652022000201201&tlng=en https://doaj.org/toc/1678-2690 1678-2690 doi:10.1590/0001-3765202220201944 https://doaj.org/article/31f3932ebae24a2d833c59e7cd583f23 |
op_doi |
https://doi.org/10.1590/0001-3765202220201944 |
container_title |
Anais da Academia Brasileira de Ciências |
container_volume |
94 |
container_issue |
suppl 1 |
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1766263901182230528 |