Trace fossils from the Lower-Middle Jurassic Bardas Blancas Formation, Neuquén Basin, Mendoza Province, Argentina
Trace fossil associations from the Lower-Middle Jurassic siliciclastic succession of the northern Neuquén Basin, Argentina are described and their palaeoenvironmental interpretation is discussed. The Bardas Blancas Formation displays facies of lower foreshore to offshore environments, such as massiv...
Guardado en:
Autores principales: | , |
---|---|
Publicado: |
2009
|
Materias: | |
Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00015709_v59_n2_p201_Bressan http://hdl.handle.net/20.500.12110/paper_00015709_v59_n2_p201_Bressan |
Aporte de: |
id |
paper:paper_00015709_v59_n2_p201_Bressan |
---|---|
record_format |
dspace |
spelling |
paper:paper_00015709_v59_n2_p201_Bressan2023-06-08T14:20:54Z Trace fossils from the Lower-Middle Jurassic Bardas Blancas Formation, Neuquén Basin, Mendoza Province, Argentina Bressan, Graciela Susana Palma, Ricardo Manuel Argentina Ichnofacies Ichnotaxonomy Jurassic N Basin Neuqué Trace fossils facies analysis fossil assemblage ichnofacies Jurassic paleoenvironment sandstone siliciclastic deposit taxonomy trace fossil Argentina Mendoza Neuquen Basin South America Arenicolites Cruziana Diplocraterion Gordia Lockeia Palaeophycus Planolites Skolithos Taenidium Thalassinoides Zoophycos Trace fossil associations from the Lower-Middle Jurassic siliciclastic succession of the northern Neuquén Basin, Argentina are described and their palaeoenvironmental interpretation is discussed. The Bardas Blancas Formation displays facies of lower foreshore to offshore environments, such as massive and laminated mudstones, laminated siltstones, hummocky cross-stratified sandstones, massive and laminated sandstones, wave-rippled sandstones, as well as fine- to medium-grained bioclastic sandstones and massive conglomerates. They contain a trace fossil assemblage low in abundance but high in diversity. The assemblage, comprising eleven ichnogenera, is dominated by Skolithos, Chondrites, Thalassinoides, Planolites, Palaeophycus, Taenidium, Gyrochorte and Arenicolites. Gordia,? Diplocraterion and Lockeia are less abundant. These trace fossils belong to the Skolithos, Cruziana and Zoophycos ichnofacies. Their distribution is controlled mainly by hydrodynamic energy, substrate consistency and oxygen levels. Storm beds exhibit two successive stages of colonization: (1) the pioneer stage, during which Skolithos, Diplocraterion and Arenicolites (elements of the Skolithos ichnofacies), were produced; and (2) the stable environment stage, represented by Chondrites, Thalassinoides, Taenidium, Gyrochorte, Gordia, Lockeia, Palaeophycus and Planolites (elements of the Cruziana ichnofacies). deeper environments exhibit a low diversity association with Chondrites and Thalassinoides, characterizing the Zoophycos ichnofacies. Fil:Bressan, G.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Palma, R.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2009 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00015709_v59_n2_p201_Bressan http://hdl.handle.net/20.500.12110/paper_00015709_v59_n2_p201_Bressan |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
Argentina Ichnofacies Ichnotaxonomy Jurassic N Basin Neuqué Trace fossils facies analysis fossil assemblage ichnofacies Jurassic paleoenvironment sandstone siliciclastic deposit taxonomy trace fossil Argentina Mendoza Neuquen Basin South America Arenicolites Cruziana Diplocraterion Gordia Lockeia Palaeophycus Planolites Skolithos Taenidium Thalassinoides Zoophycos |
spellingShingle |
Argentina Ichnofacies Ichnotaxonomy Jurassic N Basin Neuqué Trace fossils facies analysis fossil assemblage ichnofacies Jurassic paleoenvironment sandstone siliciclastic deposit taxonomy trace fossil Argentina Mendoza Neuquen Basin South America Arenicolites Cruziana Diplocraterion Gordia Lockeia Palaeophycus Planolites Skolithos Taenidium Thalassinoides Zoophycos Bressan, Graciela Susana Palma, Ricardo Manuel Trace fossils from the Lower-Middle Jurassic Bardas Blancas Formation, Neuquén Basin, Mendoza Province, Argentina |
topic_facet |
Argentina Ichnofacies Ichnotaxonomy Jurassic N Basin Neuqué Trace fossils facies analysis fossil assemblage ichnofacies Jurassic paleoenvironment sandstone siliciclastic deposit taxonomy trace fossil Argentina Mendoza Neuquen Basin South America Arenicolites Cruziana Diplocraterion Gordia Lockeia Palaeophycus Planolites Skolithos Taenidium Thalassinoides Zoophycos |
description |
Trace fossil associations from the Lower-Middle Jurassic siliciclastic succession of the northern Neuquén Basin, Argentina are described and their palaeoenvironmental interpretation is discussed. The Bardas Blancas Formation displays facies of lower foreshore to offshore environments, such as massive and laminated mudstones, laminated siltstones, hummocky cross-stratified sandstones, massive and laminated sandstones, wave-rippled sandstones, as well as fine- to medium-grained bioclastic sandstones and massive conglomerates. They contain a trace fossil assemblage low in abundance but high in diversity. The assemblage, comprising eleven ichnogenera, is dominated by Skolithos, Chondrites, Thalassinoides, Planolites, Palaeophycus, Taenidium, Gyrochorte and Arenicolites. Gordia,? Diplocraterion and Lockeia are less abundant. These trace fossils belong to the Skolithos, Cruziana and Zoophycos ichnofacies. Their distribution is controlled mainly by hydrodynamic energy, substrate consistency and oxygen levels. Storm beds exhibit two successive stages of colonization: (1) the pioneer stage, during which Skolithos, Diplocraterion and Arenicolites (elements of the Skolithos ichnofacies), were produced; and (2) the stable environment stage, represented by Chondrites, Thalassinoides, Taenidium, Gyrochorte, Gordia, Lockeia, Palaeophycus and Planolites (elements of the Cruziana ichnofacies). deeper environments exhibit a low diversity association with Chondrites and Thalassinoides, characterizing the Zoophycos ichnofacies. |
author |
Bressan, Graciela Susana Palma, Ricardo Manuel |
author_facet |
Bressan, Graciela Susana Palma, Ricardo Manuel |
author_sort |
Bressan, Graciela Susana |
title |
Trace fossils from the Lower-Middle Jurassic Bardas Blancas Formation, Neuquén Basin, Mendoza Province, Argentina |
title_short |
Trace fossils from the Lower-Middle Jurassic Bardas Blancas Formation, Neuquén Basin, Mendoza Province, Argentina |
title_full |
Trace fossils from the Lower-Middle Jurassic Bardas Blancas Formation, Neuquén Basin, Mendoza Province, Argentina |
title_fullStr |
Trace fossils from the Lower-Middle Jurassic Bardas Blancas Formation, Neuquén Basin, Mendoza Province, Argentina |
title_full_unstemmed |
Trace fossils from the Lower-Middle Jurassic Bardas Blancas Formation, Neuquén Basin, Mendoza Province, Argentina |
title_sort |
trace fossils from the lower-middle jurassic bardas blancas formation, neuquén basin, mendoza province, argentina |
publishDate |
2009 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00015709_v59_n2_p201_Bressan http://hdl.handle.net/20.500.12110/paper_00015709_v59_n2_p201_Bressan |
work_keys_str_mv |
AT bressangracielasusana tracefossilsfromthelowermiddlejurassicbardasblancasformationneuquenbasinmendozaprovinceargentina AT palmaricardomanuel tracefossilsfromthelowermiddlejurassicbardasblancasformationneuquenbasinmendozaprovinceargentina |
_version_ |
1768541823096061952 |