Cretaceous deposits in the Precordillera of La Rioja (Ciénaga del Río Huaco Formation)

This paper reports the presence of Maastrichtian rocks in the north of the Precordillera (La Rioja province). The Cretaceous succesion (122 m thick) is a classical red bed sequence composed of sandstones, mudstones, marls and thin levels of evaporites. According to lithological features 6 facies ass...

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Detalles Bibliográficos
Autores principales: Ciccioli, Patricia Lucía, Tedesco, Ana M., Barreda, Viviana Dora, Limarino, Carlos Oscar
Publicado: 2005
Materias:
Continental deposits
Cretaceous
Evaporites
La Rioja
Precordillera
algae
Characeae
Cypridopsis
Cytheridea
Gastropoda
Ilyocypris
Ostracoda
Pediastrum
Spondias purpurea
Tectochara
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v60_n1_p122_Ciccioli
http://hdl.handle.net/20.500.12110/paper_00044822_v60_n1_p122_Ciccioli
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00044822_v60_n1_p122_Ciccioli
record_format dspace
spelling paper:paper_00044822_v60_n1_p122_Ciccioli2023-06-08T14:25:51Z Cretaceous deposits in the Precordillera of La Rioja (Ciénaga del Río Huaco Formation) Ciccioli, Patricia Lucía Tedesco, Ana M. Barreda, Viviana Dora Limarino, Carlos Oscar Continental deposits Cretaceous Evaporites La Rioja Precordillera algae Characeae Cypridopsis Cytheridea Gastropoda Ilyocypris Ostracoda Pediastrum Spondias purpurea Tectochara This paper reports the presence of Maastrichtian rocks in the north of the Precordillera (La Rioja province). The Cretaceous succesion (122 m thick) is a classical red bed sequence composed of sandstones, mudstones, marls and thin levels of evaporites. According to lithological features 6 facies associations have been recognized that mainly characterize a lacustrine system developed under arid to semiarid conditions. Probably as a result of an increase in aridity, eolian sediments were deposited at the top of the Cretaceous unit. At least two transgressive-regressive events have been recognized in the lacustrine sequence. The best developed is the first event formed by fossiliferous black shales corresponding to the maximum flooding stage. These rocks have yield remains of calcareous microfossils, palynomorphs and gastropods. The former comprise charophytes, with Platychara compressa (Knowlton) an Tectochara sp. A Musacchio, anda ostracods, with Ilyocypris wichmanni punctata Musacchio y Simeoni, Eucandona? sp., Cypridopsis and Ovo cytheridea? rionegrensis Musacchio.. Palinomorphs form a monospecific assemblage of algae colonies corresponding to Pediastrum. The lithological features, stratigraphic location and fossiliferous remains clearly suggest a regional correlation with the Ciénaga del Rio Huaco Formation. This correlation considerably enlarge the regional distribution of the Cretaceous sediments which were previously limited to the Precordillera of San Juan province. © 2005 Asociación Geológica Argentina. Fil:Ciccioli, P.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tedesco, A.M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Barreda, V. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Limarino, C.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2005 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v60_n1_p122_Ciccioli http://hdl.handle.net/20.500.12110/paper_00044822_v60_n1_p122_Ciccioli
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Continental deposits
Cretaceous
Evaporites
La Rioja
Precordillera
algae
Characeae
Cypridopsis
Cytheridea
Gastropoda
Ilyocypris
Ostracoda
Pediastrum
Spondias purpurea
Tectochara
spellingShingle Continental deposits
Cretaceous
Evaporites
La Rioja
Precordillera
algae
Characeae
Cypridopsis
Cytheridea
Gastropoda
Ilyocypris
Ostracoda
Pediastrum
Spondias purpurea
Tectochara
Ciccioli, Patricia Lucía
Tedesco, Ana M.
Barreda, Viviana Dora
Limarino, Carlos Oscar
Cretaceous deposits in the Precordillera of La Rioja (Ciénaga del Río Huaco Formation)
topic_facet Continental deposits
Cretaceous
Evaporites
La Rioja
Precordillera
algae
Characeae
Cypridopsis
Cytheridea
Gastropoda
Ilyocypris
Ostracoda
Pediastrum
Spondias purpurea
Tectochara
description This paper reports the presence of Maastrichtian rocks in the north of the Precordillera (La Rioja province). The Cretaceous succesion (122 m thick) is a classical red bed sequence composed of sandstones, mudstones, marls and thin levels of evaporites. According to lithological features 6 facies associations have been recognized that mainly characterize a lacustrine system developed under arid to semiarid conditions. Probably as a result of an increase in aridity, eolian sediments were deposited at the top of the Cretaceous unit. At least two transgressive-regressive events have been recognized in the lacustrine sequence. The best developed is the first event formed by fossiliferous black shales corresponding to the maximum flooding stage. These rocks have yield remains of calcareous microfossils, palynomorphs and gastropods. The former comprise charophytes, with Platychara compressa (Knowlton) an Tectochara sp. A Musacchio, anda ostracods, with Ilyocypris wichmanni punctata Musacchio y Simeoni, Eucandona? sp., Cypridopsis and Ovo cytheridea? rionegrensis Musacchio.. Palinomorphs form a monospecific assemblage of algae colonies corresponding to Pediastrum. The lithological features, stratigraphic location and fossiliferous remains clearly suggest a regional correlation with the Ciénaga del Rio Huaco Formation. This correlation considerably enlarge the regional distribution of the Cretaceous sediments which were previously limited to the Precordillera of San Juan province. © 2005 Asociación Geológica Argentina.
author Ciccioli, Patricia Lucía
Tedesco, Ana M.
Barreda, Viviana Dora
Limarino, Carlos Oscar
author_facet Ciccioli, Patricia Lucía
Tedesco, Ana M.
Barreda, Viviana Dora
Limarino, Carlos Oscar
author_sort Ciccioli, Patricia Lucía
title Cretaceous deposits in the Precordillera of La Rioja (Ciénaga del Río Huaco Formation)
title_short Cretaceous deposits in the Precordillera of La Rioja (Ciénaga del Río Huaco Formation)
title_full Cretaceous deposits in the Precordillera of La Rioja (Ciénaga del Río Huaco Formation)
title_fullStr Cretaceous deposits in the Precordillera of La Rioja (Ciénaga del Río Huaco Formation)
title_full_unstemmed Cretaceous deposits in the Precordillera of La Rioja (Ciénaga del Río Huaco Formation)
title_sort cretaceous deposits in the precordillera of la rioja (ciénaga del río huaco formation)
publishDate 2005
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v60_n1_p122_Ciccioli
http://hdl.handle.net/20.500.12110/paper_00044822_v60_n1_p122_Ciccioli
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AT tedescoanam cretaceousdepositsintheprecordilleraoflariojacienagadelriohuacoformation
AT barredavivianadora cretaceousdepositsintheprecordilleraoflariojacienagadelriohuacoformation
AT limarinocarlososcar cretaceousdepositsintheprecordilleraoflariojacienagadelriohuacoformation
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