Paleopalynological, lithofacial and paleoenvironmental analysis of two localities of the Palo Pintado Formation (Late Miocene), Salta, Argentina
The present work focuses on the study of the palynomorphs recovered from sedimentary samples from the Quebrada El Estanque and Río Calchaquí localities of the Palo Pintado Formation (Late Miocene) Salta, Argentina. Paleocommunities were determined, and relationships were established between lithofac...
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| Autores principales: | , |
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| Formato: | Artículo revista |
| Lenguaje: | Español |
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Facultad de Ciencias Exactas y Naturales y Agrimensura
2025
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| Acceso en línea: | https://revistas.unne.edu.ar/index.php/fce/article/view/8179 |
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| Sumario: | The present work focuses on the study of the palynomorphs recovered from sedimentary samples from the Quebrada El Estanque and Río Calchaquí localities of the Palo Pintado Formation (Late Miocene) Salta, Argentina. Paleocommunities were determined, and relationships were established between lithofacies and depositional paleoenvironments. The Palo Pintado Formation is composed of sandstones and mudstone, while conglomerates are subordinate. The deposits show an arrangement in cycles that have been interpreted as river systems of low hierarchy and low mobility. Twenty-six species of palynomorphs were found in the Quebrada El Estanque, which would have been part of the aquatic, marsh, xerophilous and high-altitude forest paleocommunities. On the other hand, in Río Calchaquí, ten species of palynomorphs were found that would have integrated the paleocommunities of hygrophilous, xerophilous and high-altitude forest. In Quebrada El Estanque the sedimentation environment would correspond to floodplains in which lagoons could have formed due to river overflows. The marsh subenvironment would have taken place on the shores and the herbaceous marsh vegetation would have been in the coastal area, while the xerophilous species would have been found in more distant areas. In the Río Calchaquí, the sediments correspond to channel or intrachannel accumulations with little development of floodplains. Hygrophilous vegetation would have developed in the vicinity of river edges while xerophilous vegetation in open environments. The climate would have been warm, humid with dry seasonality. |
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