Liliane Janikian

Universidade Federal de São Paulo

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Renato Paes de Almeida

Universidade de São Paulo

Antônio Romalino Santos Fragoso-Cesar

Instituto de Geociencias

Ricardo I.F. Trindade

Universidade de São Paulo

Gélson Luís Fambrini

Universidade Federal de Pernambuco

Manoel S. D’Agrella-Filho

Universidade de São Paulo

Robert L. Gawthorpe

University of Bergen

Spyros Sergiou

University of Patras

Cláudio Riccomini

Universidade de São Paulo

Jack Gillespie

Curtin University

Gino de Gelder

National Research and Innovation Agency

Cooperative Institutions

Universidade de São Paulo

Instituto de Geociencias

Mediterranean University

National Council for Scientific and Technological Development

Sociedade Brasileira de Geofísica

Universidade Brasil

University of Bergen

University of Leeds

Hospital Universitário da Universidade de São Paulo

Universidade Cidade de São Paulo

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The Camaquã extensional basin: Neoproterozoic to early Cambrian sequences in southernmost Brazil

Brazilian Journal of Geology (2000)

Antônio Romalino Santos Fragoso-Cesar Gélson Luís Fambrini Renato Paes de Almeida Ana Paula Meireles Reis Pelosi Liliane Janikian

The Camaqua Basin is an extensional post-orogenic and pre-cratonic rift system of Neoproterozoic-Early Cambrian age located in the Gaucho Shield, Rio Grande do Sul, southernmost Brazil. The basin is divided into a series of small sub-basins which were filled with the Camaqua Group, a thick (>9,000 m) unit composed of three formations: (i) the siliciclastic Marica Formation, (ii) the volcano-sedimentary Crespos Formation and (iii) the siliciclastic Santa Barbara Formation. These units correspond to three major stratigraphic sequences, and are divided into higher order sequences. Provenance and paleocurrent analysis of the siliciclastic deposits show a close relationship of the sourcearea with the lithologies that occur today in the neighborhood of these deposits, suggesting that no important lateral transport took place along the border faults. Paleocurrent measurements indicate a northern position for the marine body that cyclically invaded the basin.

Paleocurrent

Siliciclastic

10.5327/rbg.v30i3.847

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Citations (23)

Evolution of a rift basin dominated by subaerial deposits: The Guaritas Rift, Early Cambrian, Southern Brazil

Sedimentary Geology (2009)

Renato Paes de Almeida Liliane Janikian Antônio Romalino Santos Fragoso-Cesar André Marconato

Subaerial

Alluvial fan

Tectonic subsidence

Rift valley

East African Rift

Rift zone

10.1016/j.sedgeo.2009.01.010

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Citations (63)

Tectonic implications of the 1419Ma Nova Guarita mafic intrusives paleomagnetic pole (Amazonian Craton) on the longevity of Nuna

Precambrian Research (2011)

Franklin Bispo-Santos Manoel S. D’Agrella-Filho Ricardo I.F. Trindade Sten‐Åke Elming Liliane Janikian

Supercontinent

Apparent polar wander

Baltica

Laurentia

Rodinia

Large igneous province

10.1016/j.precamres.2011.10.022

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Citations (59)

O GRUPO SANTA BÁRBARA (EDIACARANO) NA SUB-BACIA CAMAQUÃ CENTRAL, RS: ESTRATIGRAFIA E SISTEMAS DEPOSICIONAIS

Revista Brasileira de Geociências (2005)

Gélson Luís Fambrini Liliane Janikian Renato Paes de Almeida Antônio Romalino Santos Fragoso-Cesar

In the Central Camaquã Sub-basin, the Santa Bárbara Group (Ediacaran) is over 2,000 m thick, being well exposed in the Minas do Camaquã and Bom Jardim regions. The group is represented by a succession of marine to coastal sandstones and rhythmites and alluvial fan conglomerates, disposed in progradationalretrogrational cycles. Detailed stratigraphic studies of paleoenvironments, paleocurrents and provenance have lead to the subdivision of the Santa Bárbara Group, in the Central Camaquã Sub-basin, into four formations: (i) Passo da Capela Formation: silty-sandy unit composed of outer- and inner-submarine fan turbidites; (ii) Seival Formation: offshore tempestites and coastal deposits, including tidal flat deposits; (iii) Rincão dos Mouras Formation: alluvial fan and braided river pebbly unit and (iv) João Dias Formation: foreshore and shoreface coastal deposits. These studies have permitted the detailed correlation between the Minas do Camaquã and Bom Jardim regions, thus supporting the proposition of including, in the here defined Santa Bárbara Group, the deposits exposed in the Minas do Camaquã region, traditionally reported to the Arroio dos Nobres Formation.

Alluvial fan

10.25249/0375-7536.2005352227238

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Citations (12)

Seismites as indicators of reactivation of basement structures in the Parnaíba basin, Northeastern Brazil

Marlei Antônio Carrari Chamani Cláudio Riccomini Renato Paes de Almeida Liliane Janikian Carlos Henrique Grohmann

Basement

Source

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Litoestratigrafia, sistemas deposicionais e icnofósseis do Grupo Caacupé, (Ordoviciano da Bacia do Paraná) na Cordilheira de Los Altos, Paraguai oriental

Brazilian Journal of Geology (2004)

Renato Paes de Almeida Cláudio Riccomini Liliane Janikian Antônio Romalino Santos Fragoso-Cesar Victor Fernandes Velázquez

The Caacupe Group is composed of sandstones and conglomerates of presumable Ordovician age cropping out in the uplifted areas in the vicinity of the Assuncion Rift, Eastern Paraguay. This group is considered to be the lowermost unit of the Parana Basin, deposited prior to the glaciation registered in the Iapo Formation in Brazil, and thus representing the onset of the Ordovician-Silurian subsidence cycle of the basin. Stratigraphic and facies analyses of representative outcrops of the unit, mainly in the Cordilhera de los Altos region, have led to the revision of its formal lithostratigraphy and paleogeographic interpretation. This paper maintain the original lithostratigraphic subdivision of the Caacupe Group. This division considers two formations: Paraguari (lower conglomerates and pebbly sandstones) and Piribebui (upper cross-stratified sandstones and pelitic lenses), the latter abandoned without proper justification. Eleven facies are described and interpreted, leading to the characterization of a westwards flowing braided river paleosystem for the conglomeratic succession (Paraguari Formation), and a nearshore depositional paleosystem dominated by tidal bars migrating towards the northwest (ebb currents) for the sandy succession (Piribebui Formation). An abundant ichnofauna supports the interpretation of a coastal origin for the Piribebui Formation and brings additional sedimentological information. The interpreted depositional systems suggest a wide sedimentary basin devoid of proximal tectonically active margins during the deposition of the Caacupe Group, a general characteristic of the subsequent Paleozoic subsidence cycles of the basin.

Conglomerate

Outcrop

Lithostratigraphy

Marine transgression

10.5327/rbg.v34i3.1129

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Citations (0)

Expedition 381 summary

Proceedings of the International Ocean Discovery Program. Expedition reports (2019)

L.C. McNeill D. J. Shillington Gareth Carter Jez Everest Erwan Le Ber

The primary objective of International Ocean Discovery Program Expedition 381 was to retrieve a record of early continental rifting and basin evolution from the Corinth rift, central Greece.Continental rifting is fundamental for the formation of ocean basins, and active rift zones are dynamic regions of high geohazard

10.14379/iodp.proc.381.101.2019

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Citations (5)

Reappraisal of the Cretaceous and Paleogene paleogeography of eastern Amazonia based on systematic paleocurrent measurements

Cretaceous Research (2024)

Renato Paes de Almeida Camila Eliza Althaus Liliane Janikian Pedro Victor Oliveira Gomes Felipe Torres Figueiredo

Paleocurrent

Paleogene

Palaeogeography

10.1016/j.cretres.2024.105948

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Citations (1)