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Showing 1 to 10 of 10 for “"Eastern Cordillera"”.
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Cenozoic Tectonic Evolution of the Eastern Cordillera and Adjacent Basins
… focal mechanism solutions) suggest that the Eastern Cordillera region in Colombia is an active zone of deformation that has undergone various stages of deformation. Knowledge of the tectonic processes and stress evolution in the area is important in understanding the geodynamic processes at …
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Mafic magmatism in the Eastern Cordillera and Putumayo Basin, Colombia : causes and consequences
The Eastern Cordillera of Colombia is mainly composed of sedimentary rocks deposited since early Mesozoic times. Magmatic rocks are scarce. They are represented only by a few locally restricted occurrences of dykes and sills of mafic composition presumably emplaced in the Cretaceous and of volcanic …
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Sedimentary basin evolution and structural compartmentalization in the northernmost Andes : Eastern Cordillera and Magdalena Valley, Colombia
… fill along the Middle Magdalena Valley (MMV) and Eastern Cordillera (EC) fold-thrust belt of Colombia. The Volador study area (5.5-6.0 °N) displays structures that pre-date and post-date an Eocene regional unconformity. The contrasting sedimentary successions above and below the unconformity …
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Cenozoic foreland-basin evolution in the northern Andes : insights from thermochronology and basin analysis in the Eastern Cordillera, Colombia
The modern foreland basin straddling the eastern margin of the Andean orogen is the prime example of a retro-arc foreland basin system adjacent to a subduction orogen. While widely studied in the central and southern Andes, the spatial and temporal evolution of the Cenozoic foreland basin system in …
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Evaluating the Controls of Neogene Exhumation in the Tropical Northern Andes (colombia)
… tropical mountains. In chapter 1, I studied the Eastern Cordillera of the Northern Andes, a mountain range located in Colombia in the tropics of South America. To obtain exhumation rates, I used thermochronology, which is a method that records—over timescales of millions of years—the rate at …
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Palaeoenvironments and Palaeoclimates During The Late Holocene in Lake Siscunsi (Colombia), A Multiproxy Perspective
… ~2,800 years of Lake Siscunsí, located in the Eastern Cordillera of Colombia. This study is mainly based on a high-resolution diatom record in combination with Chlorophyll 𝑎 and other analyses previously done in this lake, which include grain size, C/N, δ15N, δ13C, TOM, total carbonates and …
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Subsurface mapping and 3D flexural modeling of the Putumayo foreland basin, Colombia
… zones of the PFB include: 1) the 20-Km-wide, Eastern structural zone closest to the Andean mountain front characterized by inversion of older, Jurassic half-grabens during the late Miocene; 2) the 45-Km-wide, Central structural zone characterized by moderately-inverted Jurassic half-grabens; …
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The role of wind and water in shaping earth's plateaus
… broken foreland of the Sierras Pampeanas, the Eastern Cordillera, and the Puna Plateau in the interior of the orogen. Here, convective rainfall dominates the precipitation budget and no systematic stable isotope-elevation relationship exists. Regions to the north, in the transition between the …
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Tectonics and kinematics of curved mountain belts: examples from the Andes and the Alps
… of N-S left-lateral strike-slip faults in the Eastern Cordillera at the border with the Altiplano-Puna plateau induced up to ~40° counterclockwise rotations along the fault zone, locally annulling the regional clockwise rotation. We proposed that mid-Miocene strike-slip activity developed in …
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Mountain-range uplift & climate-system interactions in the Southern Central Andes
Zwei häufig diskutierte Aspekte der spätkänozoischen Gebirgsbildung der Anden sind der Zeitpunkt sowie die Art und Weise der Heraushebung des Puna-Plateaus und seiner Randgebiete innerhalb der Ostkordillere und die damit verbundenen klimatischen Änderungen in NW Argentinien. Die Ostkordillere …