Climatic forcing of asymmetric orogenic evolution in the Eastern Cordillera of Colombia

2008 ◽  
Vol 120 (7-8) ◽  
pp. 930-949 ◽  
Author(s):  
A. Mora ◽  
M. Parra ◽  
M. R. Strecker ◽  
E. R. Sobel ◽  
H. Hooghiemstra ◽  
...  
Keyword(s):  
Climatic Forcing ◽  
Eastern Cordillera

The asymmetric evolution of the Colombian Eastern Cordillera. Tectonic inheritance or climatic forcing? New evidence from thermochronology and sedimentology

2012 ◽  
Vol 39 ◽  
pp. 112-137 ◽  
Author(s):  
Juan Carlos Ramirez-Arias ◽  
Andrés Mora ◽  
Jorge Rubiano ◽  
Ian Duddy ◽  
Mauricio Parra ◽  
...  
Keyword(s):  
Climatic Forcing ◽  
Eastern Cordillera ◽  
Tectonic Inheritance ◽  
New Evidence

scholarly journals Strong regional influence of climatic forcing datasets on global crop model ensembles

2021 ◽  
Vol 300 ◽  
pp. 108313
Author(s):  
Alex C. Ruane ◽  
Meridel Phillips ◽  
Christoph Müller ◽  
Joshua Elliott ◽  
Jonas Jägermeyr ◽  
...  
Keyword(s):  
Crop Model ◽  
Climatic Forcing ◽  
Regional Influence ◽  
Model Ensembles

scholarly journals The Upper Oligocene San Rafael intrusive complex (Eastern Cordillera, southeast Peru), host of the largest-known high-grade tin deposit

Lithos ◽  
2021 ◽  
pp. 106409
Author(s):  
Matthieu Harlaux ◽  
Kalin Kouzmanov ◽  
Stefano Gialli ◽  
Alan H. Clark ◽  
Oscar Laurent ◽  
...  
Keyword(s):  
High Grade ◽  
Intrusive Complex ◽  
Eastern Cordillera ◽  
Upper Oligocene ◽  
San Rafael ◽  
Tin Deposit

Millennial scale variability of denudation rates for the last 15 kyr inferred from the detrital 10Be record of Lake Stappitz in the Hohe Tauern massif, Austrian Alps

The Holocene ◽  
2017 ◽  
Vol 27 (12) ◽  
pp. 1914-1927 ◽  
Author(s):  
Reto Grischott ◽  
Florian Kober ◽  
Maarten Lupker ◽  
Juergen M Reitner ◽  
Ruth Drescher-Schneider ◽  
...  
Keyword(s):  
Elevated Temperatures ◽  
Anthropogenic Impacts ◽  
Sediment Cores ◽  
Tight Coupling ◽  
Climatic Forcing ◽  
Erosion Rates ◽  
Austrian Alps ◽  
Denudation Rates ◽  
Time Period ◽  
Flooding Events

Reconstructing paleo-denudation rates over Holocene timescales in an Alpine catchment provides a unique opportunity to isolate the climatic forcing of denudation from other tectonic or anthropogenic effects. Cosmogenic 10Be on two sediment cores from Lake Stappitz (Austrian Alps) were measured yielding a 15-kyr-long catchment-averaged denudation record of the upstream Seebach Valley. The persistence of a lake at the outlet of the valley fixed the baselevel, and the high mean elevation minimizes anthropogenic impacts. The 10Be record indicates a decrease in the proportion of paraglacial sediments from 15 to 7 kyr cal. BP after which the 10Be concentrations are considered to reflect hillslope erosion and thus can be converted to denudation rates. These ones significantly fluctuated over this time period: lower hillslope erosion rates of ca. 0.4 mm/year dated between 5 and 7 kyr cal. BP correlate with a stable climate, sparse flooding events and elevated temperatures that favoured the widespread growth of stabilizing soils and vegetation. Higher hillslope erosion rates of ca. 0.8 mm/year over the last ~4 kyr correlate with a variable, cooler climate where frequent flooding events enhance denudation of less protected hillslopes. Overall, our results suggest a tight coupling of climate and hillslope erosion in alpine landscapes as it has been observed in other parts of the Alps.

scholarly journals Coal petrology analysis and implications in depositional environments from upper Cretaceous to Miocene: a study case in the Eastern Cordillera of Colombia

2021 ◽  
Author(s):  
Clara Guatame ◽  
Marco Rincón
Keyword(s):  
Late Cretaceous ◽  
Foreland Basin ◽  
Late Eocene ◽  
Depositional Environments ◽  
Estuarine System ◽  
Eastern Cordillera ◽  
Stratigraphic Position ◽  
San Fernando ◽  
Coal Facies ◽  
Oil Sector

AbstractThe Piedemonte Llanero Basin is located on the eastern side of the Eastern Cordillera of the Colombian Andes. It has been the subject of numerous geological studies carried out for the oil sector, mainly. This study presents the coal-petrographical features of 15 coal seams of four geological formations from Late Cretaceous to Middle Miocene (Chipaque formation, Palmichal group, Arcillas del Limbo formation, and San Fernando formation). Analysis of 33 samples indicates enrichment in vitrinite, while liptinite and inertinite concentrations vary according to the stratigraphic position. Reflectance indicates that the coal range gradually decreases from highly volatile bituminous C (Chipaque formation) to subbituminous C (San Fernando formation). The microlithotypes with the highest concentrations are clarite and vitrinertoliptite. Maceral composition and coal facies indicate changes in the depositional conditions of the sequence. The precursor peat from Late Cretaceous to Late Paleocene accumulated under limnic conditions followed by telmatic in Late Eocene–Early Miocene. The coal facies indices show wet conditions in forest swamps with variations in the flooding surface, influxes of brackish water and good tissue preservation. The tectonic conditions along the Piedemonte Llanero basin is evident, from post-rift to foreland basin, evidenced by oxic and anoxic periods reflected in the maceral composition and its morphology. The coal environment corresponds to an estuarine system started in the Chipaque formation evolving to the lacustrine conditions in the San Fernando formation.

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