Stratigraphy and sedimentology of the Late Cretaceous-Paleogene units cropping out at the south-eastern margin of Lake Viedma, Santa Cruz Province, Argentina

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Late Cretaceous and Paleogene sedimentary rocks of the Austral Basin crop out on the south-eastern margin of Lake Viedma. In the Barrancas Blancas section, 28 m of yellowish sandstone and mudstone of the La Asunción Member of the Anita Formation are transitionally covered by 390 m of greyish sandsto...

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Autores principales: Marenssi, S.A., Casadío, S., Santillana, S.N.
Formato: JOUR
Materias:
Austral Basin
Late Cretaceous
Paleogene
Sedimentology
Stratigraphy
Cretaceous
foreland basin
paleoenvironment
sedimentary sequence
sequence stratigraphy
Argentina
Santa Cruz [Argentina]
South America
Western Hemisphere
World
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v58_n3_p403_Marenssi
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00044822_v58_n3_p403_Marenssi
record_format dspace
spelling todo:paper_00044822_v58_n3_p403_Marenssi2023-10-03T13:57:50Z Stratigraphy and sedimentology of the Late Cretaceous-Paleogene units cropping out at the south-eastern margin of Lake Viedma, Santa Cruz Province, Argentina Marenssi, S.A. Casadío, S. Santillana, S.N. Austral Basin Late Cretaceous Paleogene Sedimentology Stratigraphy Cretaceous foreland basin paleoenvironment Paleogene sedimentary sequence sequence stratigraphy Argentina Santa Cruz [Argentina] South America Western Hemisphere World Late Cretaceous and Paleogene sedimentary rocks of the Austral Basin crop out on the south-eastern margin of Lake Viedma. In the Barrancas Blancas section, 28 m of yellowish sandstone and mudstone of the La Asunción Member of the Anita Formation are transitionally covered by 390 m of greyish sandstone and mudstone of the Cerro Fortaleza Formation. The former represent a prograding barred nearshore system, whereas the latter correspond to paralic, fluvial and fluvial-tidal sedimentation. The evolution of the depositional sequences, sedimentary palaeoenvironments, sandstone provenance and palaeocurrents indicate that the sediments were deposited during the back-arc (sag) stage of the basin. At Cerro Piramides, Tertiary sedimentary rocks rest with fault contact on top of the Cerro Fortaleza Formation. The limited thickness (<1m) preserved of greenish sandstone of the Man Aike Formation precludes any attempt to interpret its depositional environment. Conglomerate, sandstone and mudstone (locally carbonaceous) of the Río Leona Formation (75 m) rest with erosional contact on the former. These rocks represent a rapid transition from a high energy to low energy fluvial systems that eventually graded into marginal marine environments represented by the fossiliferous sandstones of the Centinela Formation (<3m). The facies arrangement, evolution of the palaeoenvironments, and palaeocurrents suggest that these sediments were deposited during the foreland basin stage. © 2003 Asociación Geológica Argentina. Fil:Marenssi, S.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Santillana, S.N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v58_n3_p403_Marenssi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Austral Basin
Late Cretaceous
Paleogene
Sedimentology
Stratigraphy
Cretaceous
foreland basin
paleoenvironment
Paleogene
sedimentary sequence
sequence stratigraphy
Argentina
Santa Cruz [Argentina]
South America
Western Hemisphere
World
spellingShingle Austral Basin
Late Cretaceous
Paleogene
Sedimentology
Stratigraphy
Cretaceous
foreland basin
paleoenvironment
Paleogene
sedimentary sequence
sequence stratigraphy
Argentina
Santa Cruz [Argentina]
South America
Western Hemisphere
World
Marenssi, S.A.
Casadío, S.
Santillana, S.N.
Stratigraphy and sedimentology of the Late Cretaceous-Paleogene units cropping out at the south-eastern margin of Lake Viedma, Santa Cruz Province, Argentina
topic_facet Austral Basin
Late Cretaceous
Paleogene
Sedimentology
Stratigraphy
Cretaceous
foreland basin
paleoenvironment
Paleogene
sedimentary sequence
sequence stratigraphy
Argentina
Santa Cruz [Argentina]
South America
Western Hemisphere
World
description Late Cretaceous and Paleogene sedimentary rocks of the Austral Basin crop out on the south-eastern margin of Lake Viedma. In the Barrancas Blancas section, 28 m of yellowish sandstone and mudstone of the La Asunción Member of the Anita Formation are transitionally covered by 390 m of greyish sandstone and mudstone of the Cerro Fortaleza Formation. The former represent a prograding barred nearshore system, whereas the latter correspond to paralic, fluvial and fluvial-tidal sedimentation. The evolution of the depositional sequences, sedimentary palaeoenvironments, sandstone provenance and palaeocurrents indicate that the sediments were deposited during the back-arc (sag) stage of the basin. At Cerro Piramides, Tertiary sedimentary rocks rest with fault contact on top of the Cerro Fortaleza Formation. The limited thickness (<1m) preserved of greenish sandstone of the Man Aike Formation precludes any attempt to interpret its depositional environment. Conglomerate, sandstone and mudstone (locally carbonaceous) of the Río Leona Formation (75 m) rest with erosional contact on the former. These rocks represent a rapid transition from a high energy to low energy fluvial systems that eventually graded into marginal marine environments represented by the fossiliferous sandstones of the Centinela Formation (<3m). The facies arrangement, evolution of the palaeoenvironments, and palaeocurrents suggest that these sediments were deposited during the foreland basin stage. © 2003 Asociación Geológica Argentina.
format JOUR
author Marenssi, S.A.
Casadío, S.
Santillana, S.N.
author_facet Marenssi, S.A.
Casadío, S.
Santillana, S.N.
author_sort Marenssi, S.A.
title Stratigraphy and sedimentology of the Late Cretaceous-Paleogene units cropping out at the south-eastern margin of Lake Viedma, Santa Cruz Province, Argentina
title_short Stratigraphy and sedimentology of the Late Cretaceous-Paleogene units cropping out at the south-eastern margin of Lake Viedma, Santa Cruz Province, Argentina
title_full Stratigraphy and sedimentology of the Late Cretaceous-Paleogene units cropping out at the south-eastern margin of Lake Viedma, Santa Cruz Province, Argentina
title_fullStr Stratigraphy and sedimentology of the Late Cretaceous-Paleogene units cropping out at the south-eastern margin of Lake Viedma, Santa Cruz Province, Argentina
title_full_unstemmed Stratigraphy and sedimentology of the Late Cretaceous-Paleogene units cropping out at the south-eastern margin of Lake Viedma, Santa Cruz Province, Argentina
title_sort stratigraphy and sedimentology of the late cretaceous-paleogene units cropping out at the south-eastern margin of lake viedma, santa cruz province, argentina
url http://hdl.handle.net/20.500.12110/paper_00044822_v58_n3_p403_Marenssi
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AT casadios stratigraphyandsedimentologyofthelatecretaceouspaleogeneunitscroppingoutatthesoutheasternmarginoflakeviedmasantacruzprovinceargentina
AT santillanasn stratigraphyandsedimentologyofthelatecretaceouspaleogeneunitscroppingoutatthesoutheasternmarginoflakeviedmasantacruzprovinceargentina
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