Sedimentology and palaeontology of the Upper Jurassic Puesto Almada Member (Cañadón Asfalto Formation, Fossati sub-basin), Patagonia Argentina: Palaeoenvironmental and climatic significance
Six facies associations are described for the Puesto Almada Member at the Cerro Bandera locality (Fossati sub-basin). They correspond to lacustrine, palustrine, and pedogenic deposits (limestones); and subordinated alluvial fan, fluvial, aeolian, and pyroclastic deposits. The lacustrine-palustrine d...
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Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00370738_v296_n_p103_Cabaleri http://hdl.handle.net/20.500.12110/paper_00370738_v296_n_p103_Cabaleri |
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paper:paper_00370738_v296_n_p103_Cabaleri2023-06-08T15:02:14Z Sedimentology and palaeontology of the Upper Jurassic Puesto Almada Member (Cañadón Asfalto Formation, Fossati sub-basin), Patagonia Argentina: Palaeoenvironmental and climatic significance Cabaleri, Nora Graciela Do Campo, Margarita Diana Cañadón Asfalto Formation Facies Palaeoclimatology Palaeontology Patagonia Upper Jurassic Facies Jurassic Palaeoclimatology Palaeontology Patagonia Algae Deposits Forestry Sedimentology Sediments Wetlands Petroleum geology alluvial fan arid region depositional environment facies fossil assemblage green alga Jurassic lacustrine deposit new record paleoclimate paleoenvironment paleontology sedimentation sedimentology Argentina Patagonia Cheirolepidiaceae Chlorophyta Coleoptera Conchostraca Filicophyta Gymnospermae Hemiptera Hexapoda Insecta Invertebrata Ostracoda Six facies associations are described for the Puesto Almada Member at the Cerro Bandera locality (Fossati sub-basin). They correspond to lacustrine, palustrine, and pedogenic deposits (limestones); and subordinated alluvial fan, fluvial, aeolian, and pyroclastic deposits. The lacustrine-palustrine depositional setting consisted of carbonate alkaline shallow lakes surrounded by flooded areas in a low-lying topography. The facies associations constitute four shallowing upward successions defined by local exposure surfaces: 1) a Lacustrine-Palustrine-pedogenic facies association with a 'conchostracan'-ostracod association; 2) a Palustrine facies association representing a wetland subenvironment, and yielding 'conchostracans', body remains of insects, fish scales, ichnofossils, and palynomorphs (cheirolepidiacean species and ferns growing around water bodies, and other gymnosperms in more elevated areas); 3) an Alluvial fan facies association indicating the source of sediment supply; and 4) a Lacustrine facies association representing a second wetland episode, and yielding 'conchostracans', insect ichnofossils, and a palynoflora mainly consisting of planktonic green algae associated with hygrophile elements. The invertebrate fossil assemblage found contains the first record of fossil insect bodies (Insecta-Hemiptera and Coleoptera) for the Cañadón Asfalto Formation. The succession reflects a mainly climatic control over sedimentation. The sedimentary features of the Puesto Almada Member are in accordance with an arid climatic scenario across the Upper Jurassic, and they reflect a strong seasonality with periods of higher humidity represented by wetlands and lacustrine sediments. © 2013 Elsevier B.V. Fil:Cabaleri, N.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Do Campo, M.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2013 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00370738_v296_n_p103_Cabaleri http://hdl.handle.net/20.500.12110/paper_00370738_v296_n_p103_Cabaleri |
institution |
Universidad de Buenos Aires |
institution_str |
I-28 |
repository_str |
R-134 |
collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
topic |
Cañadón Asfalto Formation Facies Palaeoclimatology Palaeontology Patagonia Upper Jurassic Facies Jurassic Palaeoclimatology Palaeontology Patagonia Algae Deposits Forestry Sedimentology Sediments Wetlands Petroleum geology alluvial fan arid region depositional environment facies fossil assemblage green alga Jurassic lacustrine deposit new record paleoclimate paleoenvironment paleontology sedimentation sedimentology Argentina Patagonia Cheirolepidiaceae Chlorophyta Coleoptera Conchostraca Filicophyta Gymnospermae Hemiptera Hexapoda Insecta Invertebrata Ostracoda |
spellingShingle |
Cañadón Asfalto Formation Facies Palaeoclimatology Palaeontology Patagonia Upper Jurassic Facies Jurassic Palaeoclimatology Palaeontology Patagonia Algae Deposits Forestry Sedimentology Sediments Wetlands Petroleum geology alluvial fan arid region depositional environment facies fossil assemblage green alga Jurassic lacustrine deposit new record paleoclimate paleoenvironment paleontology sedimentation sedimentology Argentina Patagonia Cheirolepidiaceae Chlorophyta Coleoptera Conchostraca Filicophyta Gymnospermae Hemiptera Hexapoda Insecta Invertebrata Ostracoda Cabaleri, Nora Graciela Do Campo, Margarita Diana Sedimentology and palaeontology of the Upper Jurassic Puesto Almada Member (Cañadón Asfalto Formation, Fossati sub-basin), Patagonia Argentina: Palaeoenvironmental and climatic significance |
topic_facet |
Cañadón Asfalto Formation Facies Palaeoclimatology Palaeontology Patagonia Upper Jurassic Facies Jurassic Palaeoclimatology Palaeontology Patagonia Algae Deposits Forestry Sedimentology Sediments Wetlands Petroleum geology alluvial fan arid region depositional environment facies fossil assemblage green alga Jurassic lacustrine deposit new record paleoclimate paleoenvironment paleontology sedimentation sedimentology Argentina Patagonia Cheirolepidiaceae Chlorophyta Coleoptera Conchostraca Filicophyta Gymnospermae Hemiptera Hexapoda Insecta Invertebrata Ostracoda |
description |
Six facies associations are described for the Puesto Almada Member at the Cerro Bandera locality (Fossati sub-basin). They correspond to lacustrine, palustrine, and pedogenic deposits (limestones); and subordinated alluvial fan, fluvial, aeolian, and pyroclastic deposits. The lacustrine-palustrine depositional setting consisted of carbonate alkaline shallow lakes surrounded by flooded areas in a low-lying topography. The facies associations constitute four shallowing upward successions defined by local exposure surfaces: 1) a Lacustrine-Palustrine-pedogenic facies association with a 'conchostracan'-ostracod association; 2) a Palustrine facies association representing a wetland subenvironment, and yielding 'conchostracans', body remains of insects, fish scales, ichnofossils, and palynomorphs (cheirolepidiacean species and ferns growing around water bodies, and other gymnosperms in more elevated areas); 3) an Alluvial fan facies association indicating the source of sediment supply; and 4) a Lacustrine facies association representing a second wetland episode, and yielding 'conchostracans', insect ichnofossils, and a palynoflora mainly consisting of planktonic green algae associated with hygrophile elements. The invertebrate fossil assemblage found contains the first record of fossil insect bodies (Insecta-Hemiptera and Coleoptera) for the Cañadón Asfalto Formation. The succession reflects a mainly climatic control over sedimentation. The sedimentary features of the Puesto Almada Member are in accordance with an arid climatic scenario across the Upper Jurassic, and they reflect a strong seasonality with periods of higher humidity represented by wetlands and lacustrine sediments. © 2013 Elsevier B.V. |
author |
Cabaleri, Nora Graciela Do Campo, Margarita Diana |
author_facet |
Cabaleri, Nora Graciela Do Campo, Margarita Diana |
author_sort |
Cabaleri, Nora Graciela |
title |
Sedimentology and palaeontology of the Upper Jurassic Puesto Almada Member (Cañadón Asfalto Formation, Fossati sub-basin), Patagonia Argentina: Palaeoenvironmental and climatic significance |
title_short |
Sedimentology and palaeontology of the Upper Jurassic Puesto Almada Member (Cañadón Asfalto Formation, Fossati sub-basin), Patagonia Argentina: Palaeoenvironmental and climatic significance |
title_full |
Sedimentology and palaeontology of the Upper Jurassic Puesto Almada Member (Cañadón Asfalto Formation, Fossati sub-basin), Patagonia Argentina: Palaeoenvironmental and climatic significance |
title_fullStr |
Sedimentology and palaeontology of the Upper Jurassic Puesto Almada Member (Cañadón Asfalto Formation, Fossati sub-basin), Patagonia Argentina: Palaeoenvironmental and climatic significance |
title_full_unstemmed |
Sedimentology and palaeontology of the Upper Jurassic Puesto Almada Member (Cañadón Asfalto Formation, Fossati sub-basin), Patagonia Argentina: Palaeoenvironmental and climatic significance |
title_sort |
sedimentology and palaeontology of the upper jurassic puesto almada member (cañadón asfalto formation, fossati sub-basin), patagonia argentina: palaeoenvironmental and climatic significance |
publishDate |
2013 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00370738_v296_n_p103_Cabaleri http://hdl.handle.net/20.500.12110/paper_00370738_v296_n_p103_Cabaleri |
work_keys_str_mv |
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_version_ |
1768543742369726464 |