Upper Campanian calcareous nannofossils from the Core 2-RSS-1, Pelotas Basin, Brazil
The deep wells drilled in the Pelotas Basin, located in the southernmost of Brazil, represent a rare opportunity to understand the geological evolution of the region during the Cretaceous. The biostratigraphic framework proposed for the basin used outdated data, demanding new studies for its improve...
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ftunivlaplata:oai:sedici.unlp.edu.ar:10915/16694 2023-05-15T14:16:52+02:00 Upper Campanian calcareous nannofossils from the Core 2-RSS-1, Pelotas Basin, Brazil Guerra, R. M. Tokutake, Lucio Riogi Fauth, Gerson 2010 application/pdf http://sedici.unlp.edu.ar/handle/10915/16694 en eng http://sedici.unlp.edu.ar/handle/10915/16694 isbn:978-987-95849-7-2 http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) CC-BY-NC-SA Ciencias Naturales Paleontología Upper Campanian Calcareous nannofossils Core 2-RSS-1 Pelotas Basin Brazil Objeto de conferencia Resumen 2010 ftunivlaplata 2021-06-06T00:04:39Z The deep wells drilled in the Pelotas Basin, located in the southernmost of Brazil, represent a rare opportunity to understand the geological evolution of the region during the Cretaceous. The biostratigraphic framework proposed for the basin used outdated data, demanding new studies for its improvement. The calcareous nannofossils of the core 2-RSS-1 (depth interval 4480.35 - 4487.70 meters), drilled by Petrobras in the offshore portion of the basin are reported here. Thirty species were recognized, the most important of them are Arkhangelskiella cymbiformis Vekshina, Broinsonia parca constricta (Stradner) Hattner, Wind and Wise, Calculites obscurus (Deflandre) Prins and Sissingh, Eiffellithus turriseiffelii (Deflandre) Reinhardt, Microrhabdulus decoratus Deflandre, Micula decussata Vekshina, Reinhardtites levis Prins and Sissingh, Retecapsa crenulata (Bramlette and Martini) Grün, Tranolithus orionatus (Reinhardt) Reinhardt, and Uniplanarius sissinghii Perch-Nielsen. The co-occurrence of Broinsonia parca constricta and Reinhardtites levis indicates that the studied rocks are included in the Standard biozones CC22b to CC23a. According to the Cretaceous Standard zonation used in the present work, the studied interval is deposited close to the Upper Campanian boundary. The present and forthcoming studies will contribute to the improvement of the biostratigraphic scheme previously proposed for the Cretaceous of the Pelotas Basin. Simposio VI: Microfósiles del Mesozoico y Cenozoico de América del Sur y Antártida. Nuevas aplicaciones y problemáticas asociadas Facultad de Ciencias Naturales y Museo Conference Object Antártida Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual) Reinhardt ENVELOPE(177.200,177.200,-84.200,-84.200) |
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 Upper Campanian Calcareous nannofossils Core 2-RSS-1 Pelotas Basin Brazil |
spellingShingle |
Ciencias Naturales Paleontología Upper Campanian Calcareous nannofossils Core 2-RSS-1 Pelotas Basin Brazil Guerra, R. M. Tokutake, Lucio Riogi Fauth, Gerson Upper Campanian calcareous nannofossils from the Core 2-RSS-1, Pelotas Basin, Brazil |
topic_facet |
Ciencias Naturales Paleontología Upper Campanian Calcareous nannofossils Core 2-RSS-1 Pelotas Basin Brazil |
description |
The deep wells drilled in the Pelotas Basin, located in the southernmost of Brazil, represent a rare opportunity to understand the geological evolution of the region during the Cretaceous. The biostratigraphic framework proposed for the basin used outdated data, demanding new studies for its improvement. The calcareous nannofossils of the core 2-RSS-1 (depth interval 4480.35 - 4487.70 meters), drilled by Petrobras in the offshore portion of the basin are reported here. Thirty species were recognized, the most important of them are Arkhangelskiella cymbiformis Vekshina, Broinsonia parca constricta (Stradner) Hattner, Wind and Wise, Calculites obscurus (Deflandre) Prins and Sissingh, Eiffellithus turriseiffelii (Deflandre) Reinhardt, Microrhabdulus decoratus Deflandre, Micula decussata Vekshina, Reinhardtites levis Prins and Sissingh, Retecapsa crenulata (Bramlette and Martini) Grün, Tranolithus orionatus (Reinhardt) Reinhardt, and Uniplanarius sissinghii Perch-Nielsen. The co-occurrence of Broinsonia parca constricta and Reinhardtites levis indicates that the studied rocks are included in the Standard biozones CC22b to CC23a. According to the Cretaceous Standard zonation used in the present work, the studied interval is deposited close to the Upper Campanian boundary. The present and forthcoming studies will contribute to the improvement of the biostratigraphic scheme previously proposed for the Cretaceous of the Pelotas Basin. Simposio VI: Microfósiles del Mesozoico y Cenozoico de América del Sur y Antártida. Nuevas aplicaciones y problemáticas asociadas Facultad de Ciencias Naturales y Museo |
format |
Conference Object |
author |
Guerra, R. M. Tokutake, Lucio Riogi Fauth, Gerson |
author_facet |
Guerra, R. M. Tokutake, Lucio Riogi Fauth, Gerson |
author_sort |
Guerra, R. M. |
title |
Upper Campanian calcareous nannofossils from the Core 2-RSS-1, Pelotas Basin, Brazil |
title_short |
Upper Campanian calcareous nannofossils from the Core 2-RSS-1, Pelotas Basin, Brazil |
title_full |
Upper Campanian calcareous nannofossils from the Core 2-RSS-1, Pelotas Basin, Brazil |
title_fullStr |
Upper Campanian calcareous nannofossils from the Core 2-RSS-1, Pelotas Basin, Brazil |
title_full_unstemmed |
Upper Campanian calcareous nannofossils from the Core 2-RSS-1, Pelotas Basin, Brazil |
title_sort |
upper campanian calcareous nannofossils from the core 2-rss-1, pelotas basin, brazil |
publishDate |
2010 |
url |
http://sedici.unlp.edu.ar/handle/10915/16694 |
long_lat |
ENVELOPE(177.200,177.200,-84.200,-84.200) |
geographic |
Reinhardt |
geographic_facet |
Reinhardt |
genre |
Antártida |
genre_facet |
Antártida |
op_relation |
http://sedici.unlp.edu.ar/handle/10915/16694 isbn:978-987-95849-7-2 |
op_rights |
http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
op_rightsnorm |
CC-BY-NC-SA |
_version_ |
1766288873109848064 |