Reassessment of mid-Carboniferous glacial extent in southwestern Gondwana (Rio Blanco Basin, Argentina) inferred from paleo-mass transport of diamictites

Late Paleozoic glacial diamictites occur in many localities in western Argentina, indicating that the region was strongly affected by glaciation during the mid-Carboniferous (late Serpukhovian-early Bashkirian). In most instances these diamictites are found in steeply walled paleovalley settings in...

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Autores principales: Gulbranson, E.L., Isbell, J.L., Montañez, I.P., Limarino, C.O., Marenssi, S.A., Meyer, K., Hull, C.
Formato: INPR
Lenguaje:English
Materias:
Carboniferous
Diamictite
Gondwana
Late Paleozoic ice age
Mass transport
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_1342937X_v_n_p_Gulbranson
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_1342937X_v_n_p_Gulbranson
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spelling todo:paper_1342937X_v_n_p_Gulbranson2023-10-03T16:09:44Z Reassessment of mid-Carboniferous glacial extent in southwestern Gondwana (Rio Blanco Basin, Argentina) inferred from paleo-mass transport of diamictites Gulbranson, E.L. Isbell, J.L. Montañez, I.P. Limarino, C.O. Marenssi, S.A. Meyer, K. Hull, C. Carboniferous Diamictite Gondwana Late Paleozoic ice age Mass transport Late Paleozoic glacial diamictites occur in many localities in western Argentina, indicating that the region was strongly affected by glaciation during the mid-Carboniferous (late Serpukhovian-early Bashkirian). In most instances these diamictites are found in steeply walled paleovalley settings in the Andean Precordillera. This study presents new data from a locality north of the Precordillera that suggests an additional, distinct, volume of ice existed in the region during the Carboniferous. The glacigenic diamictites in the Rio Blanco Basin were ultimately emplaced as gravity flows, precluding inferences of paleo-ice volume. Fold nose orientation and soft-sediment groove orientations within the diamictites indicate that the deposits were emplaced from north to south, suggesting that glacial ice was most likely not sourced from the proto-Precordillera at this locality, requiring the need for another ice center to the north of the basin. Diamictite facies indicates that the sediment was initially supplied to the study area by a warm-based glacier. © 2013 International Association for Gondwana Research. Fil:Limarino, C.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Marenssi, S.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. INPR English info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_1342937X_v_n_p_Gulbranson
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
language English
orig_language_str_mv English
topic Carboniferous
Diamictite
Gondwana
Late Paleozoic ice age
Mass transport
spellingShingle Carboniferous
Diamictite
Gondwana
Late Paleozoic ice age
Mass transport
Gulbranson, E.L.
Isbell, J.L.
Montañez, I.P.
Limarino, C.O.
Marenssi, S.A.
Meyer, K.
Hull, C.
Reassessment of mid-Carboniferous glacial extent in southwestern Gondwana (Rio Blanco Basin, Argentina) inferred from paleo-mass transport of diamictites
topic_facet Carboniferous
Diamictite
Gondwana
Late Paleozoic ice age
Mass transport
description Late Paleozoic glacial diamictites occur in many localities in western Argentina, indicating that the region was strongly affected by glaciation during the mid-Carboniferous (late Serpukhovian-early Bashkirian). In most instances these diamictites are found in steeply walled paleovalley settings in the Andean Precordillera. This study presents new data from a locality north of the Precordillera that suggests an additional, distinct, volume of ice existed in the region during the Carboniferous. The glacigenic diamictites in the Rio Blanco Basin were ultimately emplaced as gravity flows, precluding inferences of paleo-ice volume. Fold nose orientation and soft-sediment groove orientations within the diamictites indicate that the deposits were emplaced from north to south, suggesting that glacial ice was most likely not sourced from the proto-Precordillera at this locality, requiring the need for another ice center to the north of the basin. Diamictite facies indicates that the sediment was initially supplied to the study area by a warm-based glacier. © 2013 International Association for Gondwana Research.
format INPR
author Gulbranson, E.L.
Isbell, J.L.
Montañez, I.P.
Limarino, C.O.
Marenssi, S.A.
Meyer, K.
Hull, C.
author_facet Gulbranson, E.L.
Isbell, J.L.
Montañez, I.P.
Limarino, C.O.
Marenssi, S.A.
Meyer, K.
Hull, C.
author_sort Gulbranson, E.L.
title Reassessment of mid-Carboniferous glacial extent in southwestern Gondwana (Rio Blanco Basin, Argentina) inferred from paleo-mass transport of diamictites
title_short Reassessment of mid-Carboniferous glacial extent in southwestern Gondwana (Rio Blanco Basin, Argentina) inferred from paleo-mass transport of diamictites
title_full Reassessment of mid-Carboniferous glacial extent in southwestern Gondwana (Rio Blanco Basin, Argentina) inferred from paleo-mass transport of diamictites
title_fullStr Reassessment of mid-Carboniferous glacial extent in southwestern Gondwana (Rio Blanco Basin, Argentina) inferred from paleo-mass transport of diamictites
title_full_unstemmed Reassessment of mid-Carboniferous glacial extent in southwestern Gondwana (Rio Blanco Basin, Argentina) inferred from paleo-mass transport of diamictites
title_sort reassessment of mid-carboniferous glacial extent in southwestern gondwana (rio blanco basin, argentina) inferred from paleo-mass transport of diamictites
url http://hdl.handle.net/20.500.12110/paper_1342937X_v_n_p_Gulbranson
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