New evidence of the importance of faulting in the structure of the Sierras Australes de la Provincia de Buenos Aires

The Sierras Australes de la Provincia de Buenos Aires or Sierra de la Ventana are situated in the south part of Buenos Aires province, Argentina, between 37°-39°S and 61°-63°W, and constitute a curved fold and thrust belt with a general northwest strike. They are formed of Precambrian to Permian roc...

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Detalles Bibliográficos
Autor principal:	Tomezzoli, Renata Nela
Publicado:	1998
Materias:	faulting fold and thrust belt Argentina
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v53_n1_p117_Tomezzoli http://hdl.handle.net/20.500.12110/paper_00044822_v53_n1_p117_Tomezzoli
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00044822_v53_n1_p117_Tomezzoli
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spelling	paper:paper_00044822_v53_n1_p117_Tomezzoli2023-06-08T14:25:19Z New evidence of the importance of faulting in the structure of the Sierras Australes de la Provincia de Buenos Aires Tomezzoli, Renata Nela faulting fold and thrust belt Argentina The Sierras Australes de la Provincia de Buenos Aires or Sierra de la Ventana are situated in the south part of Buenos Aires province, Argentina, between 37°-39°S and 61°-63°W, and constitute a curved fold and thrust belt with a general northwest strike. They are formed of Precambrian to Permian rocks. The oldest and more intensely deformed rocks out in the western ranges, whereas the younger and less deformed are located in the east. Traditionally, these ranges were considered as an example of pure folding without any associated faulting. In this paper, mesoscale structural sections that prove the importance of faulting in the ranges development are described. On a regional scale, the presence of tectonic contacts between the Lolen Formation (upper Devonian) and Providencia Formation (lower Devonian), and between the latter and the Neposta Formation (lower Devonian) are suggested in Parque Tornquist, Estancia Las Vertientes and at Cerro Tres Picos. Field evidence, suggests that the Pillahunico Ranges are structurally higher than the Ventana Ranges, because of a north-east dipping underthrust. Fil:Tomezzoli, R.N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 1998 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v53_n1_p117_Tomezzoli http://hdl.handle.net/20.500.12110/paper_00044822_v53_n1_p117_Tomezzoli
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	faulting fold and thrust belt Argentina
spellingShingle	faulting fold and thrust belt Argentina Tomezzoli, Renata Nela New evidence of the importance of faulting in the structure of the Sierras Australes de la Provincia de Buenos Aires
topic_facet	faulting fold and thrust belt Argentina
description	The Sierras Australes de la Provincia de Buenos Aires or Sierra de la Ventana are situated in the south part of Buenos Aires province, Argentina, between 37°-39°S and 61°-63°W, and constitute a curved fold and thrust belt with a general northwest strike. They are formed of Precambrian to Permian rocks. The oldest and more intensely deformed rocks out in the western ranges, whereas the younger and less deformed are located in the east. Traditionally, these ranges were considered as an example of pure folding without any associated faulting. In this paper, mesoscale structural sections that prove the importance of faulting in the ranges development are described. On a regional scale, the presence of tectonic contacts between the Lolen Formation (upper Devonian) and Providencia Formation (lower Devonian), and between the latter and the Neposta Formation (lower Devonian) are suggested in Parque Tornquist, Estancia Las Vertientes and at Cerro Tres Picos. Field evidence, suggests that the Pillahunico Ranges are structurally higher than the Ventana Ranges, because of a north-east dipping underthrust.
author	Tomezzoli, Renata Nela
author_facet	Tomezzoli, Renata Nela
author_sort	Tomezzoli, Renata Nela
title	New evidence of the importance of faulting in the structure of the Sierras Australes de la Provincia de Buenos Aires
title_short	New evidence of the importance of faulting in the structure of the Sierras Australes de la Provincia de Buenos Aires
title_full	New evidence of the importance of faulting in the structure of the Sierras Australes de la Provincia de Buenos Aires
title_fullStr	New evidence of the importance of faulting in the structure of the Sierras Australes de la Provincia de Buenos Aires
title_full_unstemmed	New evidence of the importance of faulting in the structure of the Sierras Australes de la Provincia de Buenos Aires
title_sort	new evidence of the importance of faulting in the structure of the sierras australes de la provincia de buenos aires
publishDate	1998
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v53_n1_p117_Tomezzoli http://hdl.handle.net/20.500.12110/paper_00044822_v53_n1_p117_Tomezzoli
work_keys_str_mv	AT tomezzolirenatanela newevidenceoftheimportanceoffaultinginthestructureofthesierrasaustralesdelaprovinciadebuenosaires
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New evidence of the importance of faulting in the structure of the Sierras Australes de la Provincia de Buenos Aires

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