Results 191 to 200 of about 11,379 (238)

Los Espolones de la cordillera central del Vallés

Butlletí de la Institució Catalana d'Història Natural, 1929
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Structure and tectonics of the central segment of the Eastern Cordillera of Colombia

Journal of South American Earth Sciences, 2006
Abstract In the Eastern Cordillera of Colombia, a new structural model constrained by field data, paleontologic determinations, and interpretations of seismic reflection profiles is proposed. The model implies 70 km of shortening, including reactivation of basement structures as inverse faults in both flanks of the chain.
Martin Cortes, Jacques Angelier
exaly   +2 more sources

Kinematic variations across Eastern Cordillera at 24°S (Central Andes): Tectonic and magmatic implications [PDF]

Tectonophysics, 2007
The Eastern Cordillera (Central Andes, ~24°S) consists of a basement-involved thrust system, resulting from Miocene-Quaternary eastward migrating compression, separating the Puna plateau from the Santa Barbara System foreland.
Valerio Acocella, R Omarini
exaly   +2 more sources

Neotectonic evolution of the Central Betic Cordilleras (Southern Spain)

Tectonophysics, 2005
Paleostress orientations were calculated from fault-slip data of 36 sites located along a traverse through the Central Betic Cordilleras (southern Spain). Heterogeneous fault sets, which are frequent in the area, have been divided into homogeneous subsets by cross-cutting relationships observed in the field and by a paleostress stratigraphy approach ...
Reicherter, K., Peters, G.
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Lightning and lightning fire, central cordillera, Canada

International Journal of Wildland Fire, 2002
This study examines the influences of fuel, weather and topography on lightning-caused forest fires in portions of southern British Columbia and Alberta, Canada. The results show a significant difference in lightning and lightning-caused fires east and west of the Continental Divide.
Jack Wierzchowski, Mark Heathcott, Michael D. Flannigan   +2 more
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Guatemala: Preliminary Zircon Ages from Central Cordillera

Science, 1968
Concordia resolution of uranium-lead analyses of zircons from rocks of the Guatemalan Cordillera indicates a period of plutonism, and perhaps metamorphism, in late Paleozoic times (345 ± 20 million years). Gneisses of the Chuacus Series yield an age of 1075 ± 25 million years which may be either the age of a source terrain for the original sediments ...
D N, Gomberg, P O, Banks, A R, McBirney
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Tectonic evolution of the central U.S. Cordillera

1994
AbstractThe evolution of the North American continent and adjacent ocean basins in the central Cordillera of the western United States in Phanerozoic time was governed by three sequential tectonic regimes. The first included the creation of a passive margin during the latest Proterozoic to Early Cambrian (Stewart, 1976) and the removal of an unknown ...
J. B. Saleeby, R. C. Speed, M. C. Blake
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Late Quaternary paleosols in the western and central Cordillera of Colombia

Palaeogeography, Palaeoclimatology, Palaeoecology, 1977
Abstract More or less well preserved paleosols were studied in the submontane and montane zone of the Western and Central Cordillera, Departamento del Valle, Colombia. Their Pleniglacial age was ascertained by radiocarbon analysis of charcoal which was, in several sections, found associated with the basis of volcanic ash deposits. The two ash periods
H. Fölster, W. Hetsch, E. Schrimpff
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Recent Tectonic Structures in a Transect of the Central Betic Cordillera

Pure and Applied Geophysics, 2004
The Betic Cordillera has undergone recent Alpine deformations related to the Eurasian-African plate interaction boundary. Most of the present-day relief has been built up since Tortonian times, and is related to the development of folds and faults that are overprinted on older deformations, and some of the faults may be considered as out-of-sequence ...
P. Ruano, J. Galindo-Zaldívar, A. Jabaloy   +2 more
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Rarity and Vulnerability: The Birds of the Cordillera Central of Colombia

Conservation Biology, 1992
Abstract: The rarity of an organism is widely accepted as a good predictor of vulnerability, but rarity has been interpreted in a variety of ways. defined three dimensions of rarity for an analysis of the flora of the British Isles geographic distribution, habitat specificity, and local population size.
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