Sedimentology of Eocene-Miocene deposits of the Reventazón river in a transect from las Ánimas to Peralta, Cartago province, Costa Rica
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| المؤلفون: | , |
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| التنسيق: | artículo original |
| الحالة: | Versión publicada |
| تاريخ النشر: | 2025 |
| الوصف: | This study presents a facies and architecture analysis of sedimentary deposits exposed along the middle fluvial valley of the Reventazón River, located between Las Ánimas (Turrialba) and the provincial border of Cartago and Limón, Costa Rica. Thirteen metric-scale stratigraphic columns were surveyed and correlated across the study area. Eleven lithofacies and lithofacies associations were identified, including grainstone, rudstone, and packstone-type limestones, interbedded with shales, sandstones, and brecciated conglomerates. These records document a progradational transition from Eocene–Oligocene carbonate-dominated systems to Miocene siliciclastic deltaic environments. Facies association analysis, supported by petrographic studies and micropaleontological tests of foraminifera, led to the recognition of three paleoenvironmental models: a middle to outer carbonate platform in the Eocene; a coral patch reef system and a mixed carbonate-siliciclastic platform slope in the Oligocene; and proximal delta front to prodelta–offshore environments in the Miocene. This work provides a high-resolution stratigraphic framework that enhances the understanding of the depositional and tectonostratigraphic evolution of the South Limón Basin, integrating changes relative sea-level change and continental sediment supply. |
| البلد: | Portal de Revistas UCR |
| المؤسسة: | Universidad de Costa Rica |
| Repositorio: | Portal de Revistas UCR |
| اللغة: | Español |
| OAI Identifier: | oai:portal.revistas.ucr.ac.cr:article/3085 |
| الوصول للمادة أونلاين: | https://revistas.ucr.ac.cr/index.php/rgeologica/article/view/3085 |
| كلمة مفتاحية: | South Limón Basin Lithofacies Carbonate platform Terrigenous platform Delta Rhodoliths Corals Planktonic foraminifers Cuenca Limón Sur Litofacies Plataforma carbonatada Plataforma terrígena Rodolitos Corales Foraminíferos planctónicos |