Stratigraphy and sedimentology of the Late Cretaceous-Paleogene units cropping out at the south-eastern margin of Lake Viedma, Santa Cruz Province, Argentina
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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paperaa:paper_00044822_v58_n3_p403_Marenssi2023-06-12T16:40:02Z Stratigraphy and sedimentology of the Late Cretaceous-Paleogene units cropping out at the south-eastern margin of Lake Viedma, Santa Cruz Province, Argentina Rev. Asoc. Geol. Argent. 2003;58(3):403-416 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. 2003 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion application/pdf eng 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) |
language |
Inglés |
orig_language_str_mv |
eng |
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 |
Artículo Artículo publishedVersion |
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 |
publishDate |
2003 |
url |
http://hdl.handle.net/20.500.12110/paper_00044822_v58_n3_p403_Marenssi |
work_keys_str_mv |
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_version_ |
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