Burdigalian deposits of the santa cruz formation in the sierra baguales, austral (magallanes) basin: Age, depositional environment and vertebrate fossils

J. Enrique Bostelmann; Jacobus P. Le Roux; Ana Vásquez; Néstor M. Gutiérrez; José Luis Oyarzún; Catalina Carreño; Teresa Torres; Rodrigo Otero; Andrea Llanos; C. Mark Fanning; Francisco Hervé

doi:10.5027/andgeoV40n3-a04

Burdigalian deposits of the santa cruz formation in the sierra baguales, austral (magallanes) basin: Age, depositional environment and vertebrate fossils

J. Enrique Bostelmann, Jacobus P. Le Roux, Ana Vásquez, Néstor M. Gutiérrez, José Luis Oyarzún, Catalina Carreño, Teresa Torres, Rodrigo Otero, Andrea Llanos, C. Mark Fanning, Francisco Hervé

Research output: Contribution to journal › Article › peer-review

37 Citations (Scopus)

Abstract

A succession of marine and continental strata on the southern flank of Cerro Cono in the Sierra Baguales, northeast of Torres del Paine, can be correlated with stratigraphic units exposed along the southern border of the Lago Argentino region in Santa Cruz Province, Argentina. These include the Estancia 25 de Mayo Formation and the basal part of the Santa Cruz Formation. The lithological correlation is also confirmed by detrital zircon ages (maximum age of 18.23±0.26 Ma) and a rich assemblage of terrestrial vertebrate fossils, biostratigraphically equivalent to a post-Colhuehuapian, pre-Santacrucian South American Land Mammal Age (SALMA) fauna, suggesting a range of 19 to 17.8 Ma. Similar ages have been obtained from the basal part of the Santa Cruz Formation at Estancia Quién Sabe in southwestern Argentina, supporting the assumption of a regional continuity between these deposits. A measured litho stratigraphic column is presented and the depositional environment is interpreted as a coastal plain with small, meandering rivers and ephemeral floodplain lakes. The sedimentation coincides with intensified uplift of the Patagonian Andes during the 'Quechua Phase' of Andean tectonism, which is reflected by a change in paleocurrent directions from northwest to east-northeast.

Original language	English
Pages (from-to)	458-489
Number of pages	32
Journal	Andean Geology
Volume	40
Issue number	3
DOIs	https://doi.org/10.5027/andgeoV40n3-a04
Publication status	Published - 2013

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Bostelmann, J. E., Le Roux, J. P., Vásquez, A., Gutiérrez, N. M., Oyarzún, J. L., Carreño, C., Torres, T., Otero, R., Llanos, A., Fanning, C. M., & Hervé, F. (2013). Burdigalian deposits of the santa cruz formation in the sierra baguales, austral (magallanes) basin: Age, depositional environment and vertebrate fossils. Andean Geology, 40(3), 458-489. https://doi.org/10.5027/andgeoV40n3-a04

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title = "Burdigalian deposits of the santa cruz formation in the sierra baguales, austral (magallanes) basin: Age, depositional environment and vertebrate fossils",

abstract = "A succession of marine and continental strata on the southern flank of Cerro Cono in the Sierra Baguales, northeast of Torres del Paine, can be correlated with stratigraphic units exposed along the southern border of the Lago Argentino region in Santa Cruz Province, Argentina. These include the Estancia 25 de Mayo Formation and the basal part of the Santa Cruz Formation. The lithological correlation is also confirmed by detrital zircon ages (maximum age of 18.23±0.26 Ma) and a rich assemblage of terrestrial vertebrate fossils, biostratigraphically equivalent to a post-Colhuehuapian, pre-Santacrucian South American Land Mammal Age (SALMA) fauna, suggesting a range of 19 to 17.8 Ma. Similar ages have been obtained from the basal part of the Santa Cruz Formation at Estancia Qui{\'e}n Sabe in southwestern Argentina, supporting the assumption of a regional continuity between these deposits. A measured litho stratigraphic column is presented and the depositional environment is interpreted as a coastal plain with small, meandering rivers and ephemeral floodplain lakes. The sedimentation coincides with intensified uplift of the Patagonian Andes during the 'Quechua Phase' of Andean tectonism, which is reflected by a change in paleocurrent directions from northwest to east-northeast.",

keywords = "'Notohippidian' fauna, Andean uplift, Burdigalian, Meandering rivers, Santa cruz formation, Santacrucian SALMA",

author = "Bostelmann, {J. Enrique} and {Le Roux}, {Jacobus P.} and Ana V{\'a}squez and Guti{\'e}rrez, {N{\'e}stor M.} and Oyarz{\'u}n, {Jos{\'e} Luis} and Catalina Carre{\~n}o and Teresa Torres and Rodrigo Otero and Andrea Llanos and Fanning, {C. Mark} and Francisco Herv{\'e}",

year = "2013",

doi = "10.5027/andgeoV40n3-a04",

language = "English",

volume = "40",

pages = "458--489",

journal = "Andean Geology",

issn = "0718-7092",

publisher = "Servicio Nacional de Geologia y Mineria",

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Bostelmann, JE, Le Roux, JP, Vásquez, A, Gutiérrez, NM, Oyarzún, JL, Carreño, C, Torres, T, Otero, R, Llanos, A, Fanning, CM & Hervé, F 2013, 'Burdigalian deposits of the santa cruz formation in the sierra baguales, austral (magallanes) basin: Age, depositional environment and vertebrate fossils', Andean Geology, vol. 40, no. 3, pp. 458-489. https://doi.org/10.5027/andgeoV40n3-a04

TY - JOUR

T1 - Burdigalian deposits of the santa cruz formation in the sierra baguales, austral (magallanes) basin

T2 - Age, depositional environment and vertebrate fossils

AU - Bostelmann, J. Enrique

AU - Le Roux, Jacobus P.

AU - Vásquez, Ana

AU - Gutiérrez, Néstor M.

AU - Oyarzún, José Luis

AU - Carreño, Catalina

AU - Torres, Teresa

AU - Otero, Rodrigo

AU - Llanos, Andrea

AU - Fanning, C. Mark

AU - Hervé, Francisco

PY - 2013

Y1 - 2013

N2 - A succession of marine and continental strata on the southern flank of Cerro Cono in the Sierra Baguales, northeast of Torres del Paine, can be correlated with stratigraphic units exposed along the southern border of the Lago Argentino region in Santa Cruz Province, Argentina. These include the Estancia 25 de Mayo Formation and the basal part of the Santa Cruz Formation. The lithological correlation is also confirmed by detrital zircon ages (maximum age of 18.23±0.26 Ma) and a rich assemblage of terrestrial vertebrate fossils, biostratigraphically equivalent to a post-Colhuehuapian, pre-Santacrucian South American Land Mammal Age (SALMA) fauna, suggesting a range of 19 to 17.8 Ma. Similar ages have been obtained from the basal part of the Santa Cruz Formation at Estancia Quién Sabe in southwestern Argentina, supporting the assumption of a regional continuity between these deposits. A measured litho stratigraphic column is presented and the depositional environment is interpreted as a coastal plain with small, meandering rivers and ephemeral floodplain lakes. The sedimentation coincides with intensified uplift of the Patagonian Andes during the 'Quechua Phase' of Andean tectonism, which is reflected by a change in paleocurrent directions from northwest to east-northeast.

AB - A succession of marine and continental strata on the southern flank of Cerro Cono in the Sierra Baguales, northeast of Torres del Paine, can be correlated with stratigraphic units exposed along the southern border of the Lago Argentino region in Santa Cruz Province, Argentina. These include the Estancia 25 de Mayo Formation and the basal part of the Santa Cruz Formation. The lithological correlation is also confirmed by detrital zircon ages (maximum age of 18.23±0.26 Ma) and a rich assemblage of terrestrial vertebrate fossils, biostratigraphically equivalent to a post-Colhuehuapian, pre-Santacrucian South American Land Mammal Age (SALMA) fauna, suggesting a range of 19 to 17.8 Ma. Similar ages have been obtained from the basal part of the Santa Cruz Formation at Estancia Quién Sabe in southwestern Argentina, supporting the assumption of a regional continuity between these deposits. A measured litho stratigraphic column is presented and the depositional environment is interpreted as a coastal plain with small, meandering rivers and ephemeral floodplain lakes. The sedimentation coincides with intensified uplift of the Patagonian Andes during the 'Quechua Phase' of Andean tectonism, which is reflected by a change in paleocurrent directions from northwest to east-northeast.

KW - 'Notohippidian' fauna

KW - Andean uplift

KW - Burdigalian

KW - Meandering rivers

KW - Santa cruz formation

KW - Santacrucian SALMA

UR - http://www.scopus.com/inward/record.url?scp=84883632106&partnerID=8YFLogxK

U2 - 10.5027/andgeoV40n3-a04

DO - 10.5027/andgeoV40n3-a04

M3 - Article

SN - 0718-7092

VL - 40

SP - 458

EP - 489

JO - Andean Geology

JF - Andean Geology

IS - 3

ER -

Burdigalian deposits of the santa cruz formation in the sierra baguales, austral (magallanes) basin: Age, depositional environment and vertebrate fossils

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