Artículo
Early Cretaceous Dinoflagellate Cysts from the Agrio Formation at Its Type Locality (Neuquén Basin, Argentina) and Their Biostratigraphic Implications
Paolillo, Melisa Andrea
; Guler, Maria Veronica
; Lazo, Dario Gustavo
; Pazos, Pablo Jose
; Ottone, Eduardo Guillermo
; Aguirre-Urreta, Maria Beatriz
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Fecha de publicación:
02/2018
Editorial:
Asociacion Paleontologica Argentina
Revista:
Ameghiniana
ISSN:
0002-7014
e-ISSN:
1851-8044
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The Early Cretaceous marine deposits of the Agrio Formation are widely distributed in southern Mendoza and Neuquén provinces, Argentina. The stratigraphic distribution of upper Valanginian to upper Hauterivian organic-walled dinoflagellate cysts was evaluated at the Agrio Formation, at Bajada del Agrio locality. The assemblages exhibit a relatively moderate to low diversity and those with greater abundance are dominated by a small number of species such as Circulodinium distinctum, Cribroperidinium spp., Exochosphaeridium spp., Florentinia mantellii, Kiokansium unituberculatum, and Oligosphaeridium complex. Three diagnostic bioevents of lowest (LO) and highest (HO) stratigraphic occurrences of taxa calibrated with the local ammonoid zonation were identified for the Early Cretaceous of the Neuquén Basin: the LO of Callaiosphaeridium sp. (base of Holcoptychites neuquensis Zone, earliest Hauterivian), the LO of Cymososphaeridium validum (uppermost Hoplitocrioceras gentilii Zone, upper early Hauterivian) and the HO of Cymososphaeridium validum (lowermost Crioceratites diamantensis Zone, late Hauterivian). The studied assemblages are compared with Early Cretaceous assemblages from the Northern Hemisphere. In general, the association of dinoflagellate cysts together with the selected diagnostic species exhibit a clear affinity with those of the Mediterranean region.
Palabras clave:
Biostratigraphy
,
Dinocysts
,
Hauterivian
,
South America
,
Valanginian
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IDEAN)
Articulos de INSTITUTO DE ESTUDIOS ANDINOS "DON PABLO GROEBER"
Articulos de INSTITUTO DE ESTUDIOS ANDINOS "DON PABLO GROEBER"
Articulos(INGEOSUR)
Articulos de INST.GEOLOGICO DEL SUR
Articulos de INST.GEOLOGICO DEL SUR
Citación
Paolillo, Melisa Andrea; Guler, Maria Veronica; Lazo, Dario Gustavo; Pazos, Pablo Jose; Ottone, Eduardo Guillermo; et al.; Early Cretaceous Dinoflagellate Cysts from the Agrio Formation at Its Type Locality (Neuquén Basin, Argentina) and Their Biostratigraphic Implications; Asociacion Paleontologica Argentina; Ameghiniana; 55; 5; 2-2018; 554-570
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