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| Facpi Formation | |
|---|---|
| Name | Facpi Formation |
| Type | Geological formation |
| Period | Paleogene |
| Primary lithology | Sandstone, shale |
| Named for | Facpi Valley |
| Region | Central Cordillera |
| Country | Panama |
| Thickness | 200–1200 m |
Facpi Formation The Facpi Formation is a Paleogene stratigraphic unit exposed in the Central Cordillera of Panama that preserves marine and terrestrial records across the Paleocene–Eocene transition. Research on the Facpi Formation has involved collaborations among institutions such as the Smithsonian Institution, University of Panama, Geological Society of America, American Association of Petroleum Geologists, and regional geological surveys. Fieldwork and analytical studies referencing the formation appear alongside comparative work on units like the Pebas Formation, Chucunaque Formation, Talara Basin, Gatun Formation, and Pirabas Formation.
The regional geology of the area containing the Facpi Formation integrates tectonic processes associated with the collision of the Caribbean Plate and the Panama microplate, volcanic influences from the Central American Volcanic Arc, and uplift episodes comparable to those documented in the Andes Mountains, Cordillera de Talamanca, Sierra Nevada de Santa Marta, and the Cocos Plate subduction zone. Structural mapping of faults, folds, and unconformities has been led by teams from the United States Geological Survey, Instituto Geológico y Minero de España, UNESCO, and local geological surveys, linking Facpi exposures to broader paleogeographic reconstructions used by researchers at the University of Cambridge, National Autonomous University of Mexico, Stanford University, and the University of California, Berkeley.
Stratigraphic correlations position the Facpi Formation above Paleocene units and below Eocene strata, with biostratigraphic and radiometric constraints provided by foraminiferal assemblages and detrital zircon U–Pb dating undertaken by groups at Massachusetts Institute of Technology, University of Florida, University of British Columbia, and the Max Planck Institute for Chemistry. Sequence stratigraphy ties Facpi intervals to global events documented in the Paleocene–Eocene Thermal Maximum, isotope excursions recorded in cores at Ocean Drilling Program sites, and magnetostratigraphic frameworks developed in collaboration with the International Union of Geological Sciences and researchers from ETH Zurich and Columbia University.
The Facpi Formation consists predominantly of sandstone, shale, siltstone, and interbedded conglomerate with minor limestone horizons, with petrographic and geochemical studies carried out by laboratories at the Geological Survey of Canada, Instituto Smithsonian de Investigaciones Tropicales, California Institute of Technology, and the National Autonomous University of Nicaragua. Mineralogical analyses reference heavy mineral suites comparable to those documented in studies from the Amazon Basin, Orinoco Basin, Gulf of Mexico Basin, and the Caribbean Plate margin, while geochemical provenance work integrates methods promoted by the American Chemical Society and techniques taught at the University of Leeds.
Fossil assemblages in the Facpi Formation include marine microfossils (planktonic and benthic foraminifera), nannofossils, mollusks, and occasional vertebrate remains; paleontological investigations have been published by researchers affiliated with the Smithsonian Tropical Research Institute, Natural History Museum, London, American Museum of Natural History, Royal Belgian Institute of Natural Sciences, and the National Museum of Natural History (France). Macrofaunal and palynological records provide data comparable to faunas from the Golfo de Panama, the Caribbean Sea, the Pacific Ocean, and the Tethys Ocean reconstructions, contributing to biogeographic syntheses discussed at meetings of the Paleontological Society and the International Paleontological Association.
Sedimentological and facies analyses suggest deposition in shallow marine shelf settings with proximal fluvial influence, tidal channels, and deltaic lobes, drawing analogues with modern and ancient systems studied by the Woods Hole Oceanographic Institution, Scripps Institution of Oceanography, Lamont–Doherty Earth Observatory, and sedimentologists at the University of Southampton. Paleoenvironmental interpretations link Facpi depositional patterns to sea-level changes recorded in stratigraphic studies of the Atlantic Ocean, Pacific Ocean, Caribbean Plate, and to climatic shifts documented in work by the Intergovernmental Panel on Climate Change and paleoceanographers from Max Planck Institute for Meteorology.
Outcrops of the Facpi Formation occur in the Central Cordillera and adjacent foreland basins of Panama with mapped extents in provincial areas administered by the Panama Canal Authority and documented in geological maps produced by the Republic of Panama Ministry of Commerce and Industries, the United States Geological Survey, and regional mapping projects supported by the Inter-American Development Bank and the World Bank. Correlative intervals have been proposed in nearby Colombian and Costa Rican basins by teams from Universidad Nacional de Colombia, University of Costa Rica, Universidad de Antioquia, and international collaborators from King's College London.
The Facpi Formation is significant for regional hydrocarbon exploration studied by companies such as Petrobras, Repsol, ExxonMobil, and state entities, and it hosts aquifer units and mineral resource targets assessed by the Panama Mining Authority and environmental agencies like CONAP and MINSA. Scientifically, the formation provides insights into Paleogene paleoclimate, biotic recovery, and plate interactions that inform research agendas at the National Science Foundation, the European Research Council, and international consortia including the International Ocean Discovery Program and the Latin American Geological Society.
Category:Geologic formations of Panama