Palynostratigraphy of the early Paleogene at the Laguna Manantiales locality, southern Golfo San Jorge Basin, Argentina
This study focuses on the early Paleogene deposits of the southernmost Golfo San Jorge Basin (central Patagonia, Argentina), cropping out at the Laguna Manantiales site. Based on palynological and sedimentological features, a new continental stratigraphic unit, informally named as Laguna Manantiales...
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| Formato: | Articulo |
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2024
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/167566 |
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I19-R120-10915-1675662024-06-27T20:30:30Z http://sedici.unlp.edu.ar/handle/10915/167566 Palynostratigraphy of the early Paleogene at the Laguna Manantiales locality, southern Golfo San Jorge Basin, Argentina Palinoestratigrafía del paleógeno temprano en la localidad de Laguna Manantiales, sur de la cuenca del golfo San Jorge, Argentina Quattrocchio, Mirta Elena Agüero, Luis Sebastián Iglesias, Ari Raigemborn, María Sol 2024 2024-06-27T15:17:47Z en Geología Palynomorphs Paleocene–Eocene Laguna Manantiales Strata Patagonia South America Palinomorfos Paleoceno–Eoceno Estratos de Laguna Manantiales Sudamérica This study focuses on the early Paleogene deposits of the southernmost Golfo San Jorge Basin (central Patagonia, Argentina), cropping out at the Laguna Manantiales site. Based on palynological and sedimentological features, a new continental stratigraphic unit, informally named as Laguna Manantiales Strata, is here defined. The sporomorphs recorded evidence of the presence of subtropical forests. The syncolporate pollen grains comparable to those of the modern taxon Senna pendula, are mentioned for the first time in Argentina. Based on the record of Malvacipollis diversus, Bombacacidites isoreticulatus, Cricotriporites guianensis and the similarity in the pollen grains composition, the identified palynological assemblage can be correlated to the Patagonian palynofloras from the late Paleocene–early Eocene Ligorio Márquez Formation and the early Eocene Laguna del Hunco site. Thus, the proposed age for the Laguna Manantiales Strata can be constrained between the late Paleocene and the early Eocene. The records of Huanilipollis cabrerae, H. crisci, and Mutisiapollis sp. in Laguna Manantiales Strata, confirm the early development for Mutisioideae for the early Paleogene in Patagonia. The pronounced climatic warming during the late Paleocene and the early Eocene influenced the diversification of Asteraceae in Patagonia. Este estudio se centra en los depósitos del Paleógeno temprano que afloran en el sitio de Laguna Manantiales, extremo sur de la Cuenca del Golfo San Jorge (Patagonia central, Argentina). En base a características palinológicas y sedimentológicas, se define aquí una nueva unidad estratigráfica continental, denominada informalmente Estratos de Laguna Manantiales. El registro de esporomorfos evidencia la presencia de bosques subtropicales. Granos de polen sincolporados comparables a los del taxón actual Senna pendula se mencionan por primera vez en Argentina. Considerando el registro de Malvacipollis diversus, Bombacacidites isoreticulatus, Cricotriporites guianensis y la similitud en la composición de los granos de polen con la Formación Ligorio Márquez del Paleoceno tardío–Eoceno temprano y con el Laguna del Hunco del Eoceno temprano, la edad propuesta para los Estratos de Laguna Manantiales puede ser restringida entre Paleoceno tardío y el Eoceno temprano. Los registros de Huanilipollis cabrerae, H. crisci y Mutisiapollis sp. en los estratos de Laguna Manantiales confirman el desarrollo temprano de Mutisioideae para el Paleógeno temprano en la Patagonia. El pronunciado calentamiento climático acaecido durante el Paleoceno tardío y el Eoceno temprano habría influido en la diversificación de Asteraceae en la Patagonia. Centro de Investigaciones Geológicas Articulo Articulo http://creativecommons.org/licenses/by-nd/4.0/ Creative Commons Attribution-NoDerivatives 4.0 International (CC BY-ND 4.0) application/pdf |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Geología Palynomorphs Paleocene–Eocene Laguna Manantiales Strata Patagonia South America Palinomorfos Paleoceno–Eoceno Estratos de Laguna Manantiales Sudamérica |
| spellingShingle |
Geología Palynomorphs Paleocene–Eocene Laguna Manantiales Strata Patagonia South America Palinomorfos Paleoceno–Eoceno Estratos de Laguna Manantiales Sudamérica Quattrocchio, Mirta Elena Agüero, Luis Sebastián Iglesias, Ari Raigemborn, María Sol Palynostratigraphy of the early Paleogene at the Laguna Manantiales locality, southern Golfo San Jorge Basin, Argentina |
| topic_facet |
Geología Palynomorphs Paleocene–Eocene Laguna Manantiales Strata Patagonia South America Palinomorfos Paleoceno–Eoceno Estratos de Laguna Manantiales Sudamérica |
| description |
This study focuses on the early Paleogene deposits of the southernmost Golfo San Jorge Basin (central Patagonia, Argentina), cropping out at the Laguna Manantiales site. Based on palynological and sedimentological features, a new continental stratigraphic unit, informally named as Laguna Manantiales Strata, is here defined. The sporomorphs recorded evidence of the presence of subtropical forests.
The syncolporate pollen grains comparable to those of the modern taxon Senna pendula, are mentioned for the first time in Argentina. Based on the record of Malvacipollis diversus, Bombacacidites isoreticulatus, Cricotriporites guianensis and the similarity in the pollen grains composition, the identified palynological assemblage can be correlated to the Patagonian palynofloras from the late Paleocene–early Eocene Ligorio Márquez Formation and the early Eocene Laguna del Hunco site. Thus, the proposed age for the Laguna Manantiales Strata can be constrained between the late Paleocene and the early Eocene. The records of Huanilipollis cabrerae, H. crisci, and Mutisiapollis sp. in Laguna Manantiales Strata, confirm the early development for Mutisioideae for the early Paleogene in Patagonia. The pronounced climatic warming during the late Paleocene and the early Eocene influenced the diversification of Asteraceae in Patagonia. |
| format |
Articulo Articulo |
| author |
Quattrocchio, Mirta Elena Agüero, Luis Sebastián Iglesias, Ari Raigemborn, María Sol |
| author_facet |
Quattrocchio, Mirta Elena Agüero, Luis Sebastián Iglesias, Ari Raigemborn, María Sol |
| author_sort |
Quattrocchio, Mirta Elena |
| title |
Palynostratigraphy of the early Paleogene at the Laguna Manantiales locality, southern Golfo San Jorge Basin, Argentina |
| title_short |
Palynostratigraphy of the early Paleogene at the Laguna Manantiales locality, southern Golfo San Jorge Basin, Argentina |
| title_full |
Palynostratigraphy of the early Paleogene at the Laguna Manantiales locality, southern Golfo San Jorge Basin, Argentina |
| title_fullStr |
Palynostratigraphy of the early Paleogene at the Laguna Manantiales locality, southern Golfo San Jorge Basin, Argentina |
| title_full_unstemmed |
Palynostratigraphy of the early Paleogene at the Laguna Manantiales locality, southern Golfo San Jorge Basin, Argentina |
| title_sort |
palynostratigraphy of the early paleogene at the laguna manantiales locality, southern golfo san jorge basin, argentina |
| publishDate |
2024 |
| url |
http://sedici.unlp.edu.ar/handle/10915/167566 |
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