Tetrapod tracks taphonomy in eolian facies from the Permian of Argentina

Ancient desert deposits preserve a copious ichnofossil record, particularly Permian-age deposits where the record of tetrapod footprints is present and abundant in almost all desert settings. We propose to analyze, from a taphonomic perspective, Permian footprints preserved in eolian deposits from A...

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Autores principales: Mancuso, A.C., Krapovickas, V., Marsicano, C., Benavente, C., Benedito, D., De La Fuente, M., Ottone, E.G.
Formato: JOUR
Materias:
biostratigraphy
eolian deposit
facies
footprint
fossil record
ichnology
morphology
Permian
preservation
taphonomy
tetrapod
trackway
Argentina
Tetrapoda
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_08831351_v31_n8_p374_Mancuso
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_08831351_v31_n8_p374_Mancuso
record_format dspace
spelling todo:paper_08831351_v31_n8_p374_Mancuso2023-10-03T15:40:30Z Tetrapod tracks taphonomy in eolian facies from the Permian of Argentina Mancuso, A.C. Krapovickas, V. Marsicano, C. Benavente, C. Benedito, D. De La Fuente, M. Ottone, E.G. biostratigraphy eolian deposit facies footprint fossil record ichnology morphology Permian preservation taphonomy tetrapod trackway Argentina Tetrapoda Ancient desert deposits preserve a copious ichnofossil record, particularly Permian-age deposits where the record of tetrapod footprints is present and abundant in almost all desert settings. We propose to analyze, from a taphonomic perspective, Permian footprints preserved in eolian deposits from Argentina with a detailed sedimentological study of the trackway-bearing levels, in order to find evidence of processes that may have enhanced their preservation. We defined four taphonomic modes based on preservation quality, and the morphological and extra-morphological features of the footprints.Mode 1 includes footprints with detailed impressions of the palm, digits and claws. Mode 2 includes tracks with palm and digit impressions associated with small bulbous-shape marginal rims. Mode 3 includes tracks characterized by large, bulbous, marginal rims and randomly preserved palm impressions. Mode 4 includes footprints with shallow digit and palm impressions associated with sand-crescent marginal rims. The Los Reyunos footprints suggest preservation in: (1) dry sand, evidenced by sediment slipping down-slope structures and (2) subsurface damp sand, evidenced by digit impressions and claw drag traces. Also, we found vertical water content variations along the dune foresets, evidenced by a varying amount of sediment slipping down-slope in the same trackway. Moreover, differences in the time of entombment are suggested by the morphology of rims (bulbous-shape or sand-crescent). The stratigraphic genetic framework resulting from the Los Reyunos taphonomic analysis supports changes in the interstitial subsurface water and rapid entombment of the tracking surface due to a high rate of sediment supply as the main factor for footprint preservation. © Copyright 2016, SEPM (Society for Sedimentary Geology). Fil:Mancuso, A.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Krapovickas, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Marsicano, C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ottone, E.G. 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_08831351_v31_n8_p374_Mancuso
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic biostratigraphy
eolian deposit
facies
footprint
fossil record
ichnology
morphology
Permian
preservation
taphonomy
tetrapod
trackway
Argentina
Tetrapoda
spellingShingle biostratigraphy
eolian deposit
facies
footprint
fossil record
ichnology
morphology
Permian
preservation
taphonomy
tetrapod
trackway
Argentina
Tetrapoda
Mancuso, A.C.
Krapovickas, V.
Marsicano, C.
Benavente, C.
Benedito, D.
De La Fuente, M.
Ottone, E.G.
Tetrapod tracks taphonomy in eolian facies from the Permian of Argentina
topic_facet biostratigraphy
eolian deposit
facies
footprint
fossil record
ichnology
morphology
Permian
preservation
taphonomy
tetrapod
trackway
Argentina
Tetrapoda
description Ancient desert deposits preserve a copious ichnofossil record, particularly Permian-age deposits where the record of tetrapod footprints is present and abundant in almost all desert settings. We propose to analyze, from a taphonomic perspective, Permian footprints preserved in eolian deposits from Argentina with a detailed sedimentological study of the trackway-bearing levels, in order to find evidence of processes that may have enhanced their preservation. We defined four taphonomic modes based on preservation quality, and the morphological and extra-morphological features of the footprints.Mode 1 includes footprints with detailed impressions of the palm, digits and claws. Mode 2 includes tracks with palm and digit impressions associated with small bulbous-shape marginal rims. Mode 3 includes tracks characterized by large, bulbous, marginal rims and randomly preserved palm impressions. Mode 4 includes footprints with shallow digit and palm impressions associated with sand-crescent marginal rims. The Los Reyunos footprints suggest preservation in: (1) dry sand, evidenced by sediment slipping down-slope structures and (2) subsurface damp sand, evidenced by digit impressions and claw drag traces. Also, we found vertical water content variations along the dune foresets, evidenced by a varying amount of sediment slipping down-slope in the same trackway. Moreover, differences in the time of entombment are suggested by the morphology of rims (bulbous-shape or sand-crescent). The stratigraphic genetic framework resulting from the Los Reyunos taphonomic analysis supports changes in the interstitial subsurface water and rapid entombment of the tracking surface due to a high rate of sediment supply as the main factor for footprint preservation. © Copyright 2016, SEPM (Society for Sedimentary Geology).
format JOUR
author Mancuso, A.C.
Krapovickas, V.
Marsicano, C.
Benavente, C.
Benedito, D.
De La Fuente, M.
Ottone, E.G.
author_facet Mancuso, A.C.
Krapovickas, V.
Marsicano, C.
Benavente, C.
Benedito, D.
De La Fuente, M.
Ottone, E.G.
author_sort Mancuso, A.C.
title Tetrapod tracks taphonomy in eolian facies from the Permian of Argentina
title_short Tetrapod tracks taphonomy in eolian facies from the Permian of Argentina
title_full Tetrapod tracks taphonomy in eolian facies from the Permian of Argentina
title_fullStr Tetrapod tracks taphonomy in eolian facies from the Permian of Argentina
title_full_unstemmed Tetrapod tracks taphonomy in eolian facies from the Permian of Argentina
title_sort tetrapod tracks taphonomy in eolian facies from the permian of argentina
url http://hdl.handle.net/20.500.12110/paper_08831351_v31_n8_p374_Mancuso
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