A Cambrian mixed carbonate–siliciclastic platform in SW Gondwana: evidence from the Western Sierras Pampeanas (Argentina) and implications for the early Paleozoic paleogeography of the proto-Andean margin

2018 ◽  
Vol 107 (7) ◽  
pp. 2605-2625 ◽  
Author(s):  
Carlos D. Ramacciotti ◽  
César Casquet ◽  
Edgardo G. Baldo ◽  
Carmen Galindo ◽  
Robert J. Pankhurst ◽  
...  
Keyword(s):  
Early Paleozoic ◽  
Sierras Pampeanas ◽  
Sw Gondwana ◽  
Mixed Carbonate

Identifying Laurentian and SW Gondwana sources in the Neoproterozoic to Early Paleozoic metasedimentary rocks of the Sierras Pampeanas: Paleogeographic and tectonic implications

2016 ◽  
Vol 32 ◽  
pp. 193-212 ◽  
Author(s):  
Carlos W. Rapela ◽  
Sebastian O. Verdecchia ◽  
Cesar Casquet ◽  
Robert J. Pankhurst ◽  
Edgardo G. Baldo ◽  
...  
Keyword(s):  
Early Paleozoic ◽  
Sierras Pampeanas ◽  
Metasedimentary Rocks ◽  
Tectonic Implications ◽  
Sw Gondwana

scholarly journals Lithostratigraphic and allostratigraphic framework of the Cambrian–Ordovician Potsdam Group and correlations across Early Paleozoic southern Laurentia

2017 ◽  
Vol 54 (5) ◽  
pp. 550-585 ◽  
Author(s):  
David G. Lowe ◽  
R.W.C. Arnott ◽  
Godfrey S. Nowlan ◽  
A.D. McCracken
Keyword(s):  
Climate Change ◽  
Early Paleozoic ◽  
Middle Cambrian ◽  
Shallow Marine ◽  
Upper Cambrian ◽  
Subaerial Exposure ◽  
Marine Sedimentation ◽  
Lower Ordovician ◽  
Fluvial Sedimentation ◽  
Mixed Carbonate

The Potsdam Group is a Cambrian to Lower Ordovician siliciclastic unit that crops out along the southeastern margins of the Ottawa graben. From its base upward, the Potsdam consists of the Ausable, Hannawa Falls, and Keeseville formations. In addition, the Potsdam is subdivided into three allounits: allounit 1 comprises the Ausable and Hannawa Falls, and allounits 2 and 3, respectively, the lower and upper parts of the Keeseville. Allounit 1 records Early to Middle Cambrian syn-rift arkosic fluvial sedimentation (Ausable Formation) with interfingering mudstone, arkose, and dolostone of the marine Altona Member recording transgression of the easternmost part of the Ottawa graben. Rift sedimentation was followed by a Middle Cambrian climate change resulting in local quartzose aeolian sedimentation (Hannawa Falls Formation). Allounit 1 sedimentation termination coincided with latest(?) Middle Cambrian tectonic reactivation of parts of the Ottawa graben. Allounit 2 (lower Keeseville) records mainly Upper Cambrian quartzose fluvial sedimentation, with transgression of the northern Ottawa graben resulting in deposition of mixed carbonate–siliciclastic strata of the marine Rivière Aux Outardes Member. Sedimentation was then terminated by an earliest Ordovician regression and unconformity development. Allounit 3 (upper Keeseville) records diachronous transgression across the Ottawa graben that by the Arenigian culminated in mixed carbonate–siliciclastic, shallow marine sedimentation (Theresa Formation). The contact separating the Potsdam Group and Theresa Formation is conformable, except locally in parts of the northern Ottawa graben where the presence of localized islands and (or) coastal salients resulted in subaerial exposure and erosion of the uppermost Potsdam strata, and accordingly unconformity development.

Early Cambrian multiple-sourced plutonism in the Eastern Sierras Pampeanas, Córdoba, Argentina: Implications for the evolution of the early Paleozoic Gondwana margin

2021 ◽  
Vol 106 ◽  
pp. 103048
Author(s):  
Alina M. Tibaldi ◽  
Juan E. Otamendi ◽  
Alejandro H. Demichelis ◽  
Matías G. Barzola ◽  
Fernando Barra ◽  
...  
Keyword(s):  
Early Cambrian ◽  
Early Paleozoic ◽  
Sierras Pampeanas ◽  
Eastern Sierras Pampeanas ◽  
Gondwana Margin

The geodynamic evolution of the Famatinian orogen from the paleomagnetic record of El Hongo trondhjemite (Early Paleozoic, Sierras Pampeanas de Córdoba, Argentina)

2021 ◽  
Vol 106 ◽  
pp. 103059
Author(s):  
Silvana E. Geuna ◽  
Leonardo D. Escosteguy ◽  
Belena Díaz Appella ◽  
Lucio Pinotti ◽  
Fernando D′Eramo ◽  
...  
Keyword(s):  
Early Paleozoic ◽  
Geodynamic Evolution ◽  
Sierras Pampeanas

scholarly journals The Neoproterozoic-early Paleozoic metamorphic and magmatic evolution of the Eastern Sierras Pampeanas: an overview

2010 ◽  
Vol 100 (2-3) ◽  
pp. 465-488 ◽  
Author(s):  
André Steenken ◽  
Mónica G. López de Luchi ◽  
Carmen Martínez Dopico ◽  
Malte Drobe ◽  
Klaus Wemmer ◽  
...  
Keyword(s):  
Early Paleozoic ◽  
Magmatic Evolution ◽  
Sierras Pampeanas ◽  
Eastern Sierras Pampeanas
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