Pleistocene Glaciations in the Northern Tropical Andes, South America (Venezuela, Colombia and Ecuador)

Angel, Isandra; Guzmán, Oswaldo; Carcaillet, Julien

doi:10.18172/cig.3202

Cited by 9 publications

(9 citation statements)

References 49 publications

(132 reference statements)

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“…The first two contributions describe the deglaciation of the glaciers situated in the five countries of the Northern and Central Andes. Angel et al (2017) present the state of knowledge in the Northern Andes, i.e. in Venezuela, Colombia and Ecuador.…”

Section: The Deglaciation Of the Andean Mountains And Tierra De Fuegomentioning

confidence: 98%

“…The evidence of glacial advances that coincide with the Younger Dryas is very limited in South America. There is evidence of a cold climate in the Northern Andes at that time and some glacial advances have been observed, but not in a generalized way (Angel et al, 2017). Mark et al (2017) found that glaciers in Peru and Bolivia retreated significantly during the YD due to arid climates.…”

Section: Effects Of the Younger Dryasmentioning

confidence: 99%

“…The knowledge of the characteristics of the maximum ice extent at the end of the Pleistocene reveals a very broad chronological range in the Northern Andes. Practically the only common characteristic is that it precedes the LGM and, although it does not present a great consistence, it could date before 38 ka (Angel et al, 2017). In the Northern Andes, there is still scarce information about the initial and most marked phases of deglaciation.…”

Section: The Maximum Ice Extent and The Beginning Of Deglaciationmentioning

confidence: 99%

“…According to Angel et al (2017), the knowledge of the deglaciation history of the Northern Andes is very limited and, therefore, we cannot draw general conclusions from it yet, although most of glacial advances are acknowledged contemporary to the H1. Mark et al (2017) refer to the diverse positive advances that interrupted deglaciation in Peru and Bolivia between 20-18 ka, where a good number of moraines are dated with an average of 18.9 ± 0.5 ka, always coinciding with wet phases.…”

Section: The Pace Of Deglaciation During Its First Phases and The Impmentioning

confidence: 99%

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The state of knowledge on the deglaciation of America in 2017

Palacios

2017

CIG

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This work presents a summary of all contributions included in this Special Issue on the deglaciation of America. It analyses the differences and coincidences between the phases of glacial evolution and their chronology in each of the regions studied, and seeks a possible explanation for asynchronies, according to the opinions of the authors of the contributions. Most of the papers show significant diversity within each region due to local factors and different approaches to their study. Often, local differences are even more important than differences with other regions. In North and Central America glacial evolution appears quite uniform, in line with the evolution of the temperature in the North Atlantic. The differences found between some regions may be due to slight variations in the impact of the temperature of the Atlantic in each region, and to differences in approaching their study. The glacial evolution of the Andes presents a greater diversity, probably due to the existence of arid areas along most of the mountain range, which show a greater sensitivity to the reception of humidity than to temperature in their glacial balance. In general, researchers have detected an attenuation of the influence of the temperature of the North Atlantic towards the south, and of the Antarctic Cold Reversal towards the north.

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Section: The Deglaciation Of the Andean Mountains And Tierra De Fuegomentioning

confidence: 98%

Section: Effects Of the Younger Dryasmentioning

confidence: 99%

Section: The Maximum Ice Extent and The Beginning Of Deglaciationmentioning

confidence: 99%

Section: The Pace Of Deglaciation During Its First Phases and The Impmentioning

confidence: 99%

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The state of knowledge on the deglaciation of America in 2017

Palacios

2017

CIG

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“…This increase in relief is consistent with regional paleogeographic reconstructions [56], which show the Panama Arc colliding with North Andes (Figure 25), raising the relief of the Western and Central Cordilleras, increasing the volumes of sediments eroded and transported by the Cauca and Magdalena rivers to the MSF area. In addition to the regional process of raising the Central and Western Cordilleras, this process could be extended to the Eastern Cordillera, providing the conditions for the accumulation of glacial deposits at 2.6 Ma [118], [119], coincident with the transition between the maximum relative sea level rise and the beginning of a major sea level fall that marks the top of the S05 sequence (Figures 8 and 15). [116].…”

Section: Sedimentary Sequences Accumulated In the Cb After The Union Of The Cauca -Magdalena Riversmentioning

confidence: 99%

Mass balance of Neogene sediments in the Colombia basin relationship with the evolution of the Magdalena and Cauca River basins

Ramos

Martínez

Gómez

et al. 2021

CT&F Cienc. Tecnol. Futuro

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The Colombia basin contains large volumes of sediment accumulated during the last 17 My. The use of isochore maps, exploratory wells, micropaleontological and geochronological dates has enabled us to estimate the volumes of sediment and accumulation rates in this basin. The analysis of source of sediments and exhumation data from the Northern Andes of South America led to the definition of areas and thicknesses of material eroded during the Neogene - Quaternary, to obtain volumes or material eroded from the continent that can be correlated with sediment volumes accumulated in the Colombia Basin. The analyzed sediment volumes suggest that during the last 17 My ~72.06x1015 Tons accumulated in the Colombia Basin, while ~ 7.16x1013 Tons accumulated in the continental catchment areas. The sedimentation in the Colombian Basin has occurred at variable rates, with values ranging from 55 MTons/My to 295 MTons/My, with a peak of 803 MTons/My in the early Pleistocene (between 2.4 and 2.2 Ma). The evaluation between the total volumes of sediment accumulated in the offshore and onshore, suggests that in the continental part of the basin less than 4% of the total volume of eroded sediment is trapped and, therefore, the behavior of the accumulation rates calculated in the offshore directly reflect the relief evolution of South America’s Northern Andes. It seems, at large, that the lithospheric convergence rates and subduction angle (South America vs Nazca and Meso Atlantic opening) have controlled the regional exhumation of the Northern Andes, with the exception of the Pleistocene high sedimentation event, which seems to coincide with local events such as the collision of the Panama Arch against Western Antioquia. It may be concluded that thanks to this collision, drainage systems such as those of the Magdalena and Cauca rivers were modified, which resulted in the formation of the Magdalena Submarine Fan.

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Late Pleistocene glaciation in South America

Darvill

2025

Encyclopedia of Quaternary Science

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Pleistocene Glaciations in the Northern Tropical Andes, South America (Venezuela, Colombia and Ecuador)

Abstract: ABSTRACT. This article presents an overview of glaciation studies in the northern tropical Andes (Venezuela, Colombia and Ecuador)

Cited by 9 publications

References 49 publications

The state of knowledge on the deglaciation of America in 2017

The state of knowledge on the deglaciation of America in 2017

Mass balance of Neogene sediments in the Colombia basin relationship with the evolution of the Magdalena and Cauca River basins

Late Pleistocene glaciation in South America

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