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Abstract:

A palaeoenvironmental model for the Picún Leufú Formation (Jurassic/Cretaceous boundary), which crops out in the Neuquén Basin, Argentina, on the southwestern margin of Gondwana, is presented in this paper for the first time. Detailed stratigraphic sections exposed along National Road 40 where it crosses the Picún Leufú Creek (type locality) and in the Cerrito Caracoles area, were examined and sampled. Based on a combination of the sedimentological data obtained (facies/microfacies analysis) and the relationship between benthic macrofaunas and their taphonomic attributes, it is concluded that the formation reflects a tidally dominated, rimmed-shelf setting characterized by prograding bars dissected by channels and thick lagoonal facies with shoal developments. In the Cerrito Caracoles area, where only the basal part of the formation is exposed, it is interpreted to have been deposited in a shallow subtidal marine environment in which shelf margin facies with patch reefs have been recognized. © 2007 Elsevier Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:Tidally dominated, rimmed-shelf facies of the Picún Leufú Formation (Jurassic/Cretaceous boundary) in southwest Gondwana, Neuquén Basin, Argentina
Autor:Armella, C.; Cabaleri, N.; Leanza, H.A.
Filiación:CONICET-UBA, Pabellon INGEIS - Ciudad Universitaria, 1428 Buenos Aires, Argentina
CONICET-SEGEMAR, Av. Julio A. Roca 651, 10 piso, 1322 Buenos Aires, Argentina
Palabras clave:Argentina; Carbonate shelf; Facies/microfacies analysis; Jurassic/Cretaceous boundary; Neuquén Basin; Palaeontology; Picún Leufú Formation; Sedimentology; bar; benthos; biostratigraphy; carbonate sediment; facies analysis; formation mechanism; Jurassic-Cretaceous boundary; paleoenvironment; shelf sediment; taphonomy; wave propagation; Argentina; Neuquen Basin; South America
Año:2007
Volumen:28
Número:6
Página de inicio:961
Página de fin:979
DOI: http://dx.doi.org/10.1016/j.cretres.2007.01.001
Título revista:Cretaceous Research
Título revista abreviado:Cretaceous Res.
ISSN:01956671
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01956671_v28_n6_p961_Armella

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Citas:

---------- APA ----------
Armella, C., Cabaleri, N. & Leanza, H.A. (2007) . Tidally dominated, rimmed-shelf facies of the Picún Leufú Formation (Jurassic/Cretaceous boundary) in southwest Gondwana, Neuquén Basin, Argentina. Cretaceous Research, 28(6), 961-979.
http://dx.doi.org/10.1016/j.cretres.2007.01.001
---------- CHICAGO ----------
Armella, C., Cabaleri, N., Leanza, H.A. "Tidally dominated, rimmed-shelf facies of the Picún Leufú Formation (Jurassic/Cretaceous boundary) in southwest Gondwana, Neuquén Basin, Argentina" . Cretaceous Research 28, no. 6 (2007) : 961-979.
http://dx.doi.org/10.1016/j.cretres.2007.01.001
---------- MLA ----------
Armella, C., Cabaleri, N., Leanza, H.A. "Tidally dominated, rimmed-shelf facies of the Picún Leufú Formation (Jurassic/Cretaceous boundary) in southwest Gondwana, Neuquén Basin, Argentina" . Cretaceous Research, vol. 28, no. 6, 2007, pp. 961-979.
http://dx.doi.org/10.1016/j.cretres.2007.01.001
---------- VANCOUVER ----------
Armella, C., Cabaleri, N., Leanza, H.A. Tidally dominated, rimmed-shelf facies of the Picún Leufú Formation (Jurassic/Cretaceous boundary) in southwest Gondwana, Neuquén Basin, Argentina. Cretaceous Res. 2007;28(6):961-979.
http://dx.doi.org/10.1016/j.cretres.2007.01.001