Sedimentology and paleoenvironments of the Patagoniano and the transition to the Santa Cruz Formation south of Lago Argentino, southern Patagonia

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Sedimentology and paleoenvironments of the Patagoniano and its transition to the Santa Cruz Formation south of Lago Argentino, southern Patagonia. Detailed sedimentological analysis of the Patagoniano and its transition to the Santa Cruz Formation has been carried out south of Lago Argentino, in sou...

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Autores principales: Cuitiño, J.I., Scasso, R.A.
Formato: JOUR
Materias:
Cenozoic
Marine transgression
Patagonia
Patagoniano
Santa Cruz Formation
conglomerate
depositional sequence
discontinuity
lithofacies
paleoenvironment
sandstone
sedimentology
sequence stratigraphy
transgression
Argentina
Santa Cruz [Argentina]
Ostreidae
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00044822_v66_n3_p406_Cuitino
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00044822_v66_n3_p406_Cuitino
record_format dspace
spelling todo:paper_00044822_v66_n3_p406_Cuitino2023-10-03T13:58:43Z Sedimentology and paleoenvironments of the Patagoniano and the transition to the Santa Cruz Formation south of Lago Argentino, southern Patagonia Cuitiño, J.I. Scasso, R.A. Cenozoic Marine transgression Patagonia Patagoniano Santa Cruz Formation Cenozoic conglomerate depositional sequence discontinuity lithofacies paleoenvironment sandstone sedimentology sequence stratigraphy transgression Argentina Patagonia Santa Cruz [Argentina] Ostreidae Sedimentology and paleoenvironments of the Patagoniano and its transition to the Santa Cruz Formation south of Lago Argentino, southern Patagonia. Detailed sedimentological analysis of the Patagoniano and its transition to the Santa Cruz Formation has been carried out south of Lago Argentino, in southern Patagonia. The 180 meters thick succession of fossiliferous sandstones was subdivided into twelve lithofacies, grouped in three facies associations. From base to top we defined the facies association I, dominated by massive, bioturbated and fossiliferous sandstones; the facies association II, dominated by fining upward cycles of cross-stratified sandstones and heterolithic facies; and the facies association III dominated by thin conglomeratic levels interbedded with mudstones rich in plant remains and paleosoils. The facies association I is interpreted as the deposit of a transgressive, shallow sea with oyster rich biogenic accumulations, finally evolving to a coastal plain paleoenvironment. A new transgression originated the discontinuity underlying the facies association II, which was interpreted as a progradational estuarine system. Finally, the ongoing progradation produced the fluvial meandering system of facies association III, assigned to the Santa Cruz Formation. The new name "Estancia 25 de Mayo" is formalized here for the Patagoniano in the southernmost Cordillera Patagónica, instead of the problematic name Centinela Formation. The Estancia 25 de Mayo Formation was subdivided in two members: the lower Quién Sabe Member, equivalent to the facies association I, and the upper Bandurrias Member, equivalent to the (facies association II). Fil:Cuitiño, J.I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Scasso, R.A. 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_v66_n3_p406_Cuitino
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Cenozoic
Marine transgression
Patagonia
Patagoniano
Santa Cruz Formation
Cenozoic
conglomerate
depositional sequence
discontinuity
lithofacies
paleoenvironment
sandstone
sedimentology
sequence stratigraphy
transgression
Argentina
Patagonia
Santa Cruz [Argentina]
Ostreidae
spellingShingle Cenozoic
Marine transgression
Patagonia
Patagoniano
Santa Cruz Formation
Cenozoic
conglomerate
depositional sequence
discontinuity
lithofacies
paleoenvironment
sandstone
sedimentology
sequence stratigraphy
transgression
Argentina
Patagonia
Santa Cruz [Argentina]
Ostreidae
Cuitiño, J.I.
Scasso, R.A.
Sedimentology and paleoenvironments of the Patagoniano and the transition to the Santa Cruz Formation south of Lago Argentino, southern Patagonia
topic_facet Cenozoic
Marine transgression
Patagonia
Patagoniano
Santa Cruz Formation
Cenozoic
conglomerate
depositional sequence
discontinuity
lithofacies
paleoenvironment
sandstone
sedimentology
sequence stratigraphy
transgression
Argentina
Patagonia
Santa Cruz [Argentina]
Ostreidae
description Sedimentology and paleoenvironments of the Patagoniano and its transition to the Santa Cruz Formation south of Lago Argentino, southern Patagonia. Detailed sedimentological analysis of the Patagoniano and its transition to the Santa Cruz Formation has been carried out south of Lago Argentino, in southern Patagonia. The 180 meters thick succession of fossiliferous sandstones was subdivided into twelve lithofacies, grouped in three facies associations. From base to top we defined the facies association I, dominated by massive, bioturbated and fossiliferous sandstones; the facies association II, dominated by fining upward cycles of cross-stratified sandstones and heterolithic facies; and the facies association III dominated by thin conglomeratic levels interbedded with mudstones rich in plant remains and paleosoils. The facies association I is interpreted as the deposit of a transgressive, shallow sea with oyster rich biogenic accumulations, finally evolving to a coastal plain paleoenvironment. A new transgression originated the discontinuity underlying the facies association II, which was interpreted as a progradational estuarine system. Finally, the ongoing progradation produced the fluvial meandering system of facies association III, assigned to the Santa Cruz Formation. The new name "Estancia 25 de Mayo" is formalized here for the Patagoniano in the southernmost Cordillera Patagónica, instead of the problematic name Centinela Formation. The Estancia 25 de Mayo Formation was subdivided in two members: the lower Quién Sabe Member, equivalent to the facies association I, and the upper Bandurrias Member, equivalent to the (facies association II).
format JOUR
author Cuitiño, J.I.
Scasso, R.A.
author_facet Cuitiño, J.I.
Scasso, R.A.
author_sort Cuitiño, J.I.
title Sedimentology and paleoenvironments of the Patagoniano and the transition to the Santa Cruz Formation south of Lago Argentino, southern Patagonia
title_short Sedimentology and paleoenvironments of the Patagoniano and the transition to the Santa Cruz Formation south of Lago Argentino, southern Patagonia
title_full Sedimentology and paleoenvironments of the Patagoniano and the transition to the Santa Cruz Formation south of Lago Argentino, southern Patagonia
title_fullStr Sedimentology and paleoenvironments of the Patagoniano and the transition to the Santa Cruz Formation south of Lago Argentino, southern Patagonia
title_full_unstemmed Sedimentology and paleoenvironments of the Patagoniano and the transition to the Santa Cruz Formation south of Lago Argentino, southern Patagonia
title_sort sedimentology and paleoenvironments of the patagoniano and the transition to the santa cruz formation south of lago argentino, southern patagonia
url http://hdl.handle.net/20.500.12110/paper_00044822_v66_n3_p406_Cuitino
work_keys_str_mv AT cuitinoji sedimentologyandpaleoenvironmentsofthepatagonianoandthetransitiontothesantacruzformationsouthoflagoargentinosouthernpatagonia
AT scassora sedimentologyandpaleoenvironmentsofthepatagonianoandthetransitiontothesantacruzformationsouthoflagoargentinosouthernpatagonia
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