Results 131 to 140 of about 919 (172)
Hercynian deformation and metamorphism in the Cordillera Oriental of Southern Bolivia, Central Andes
Tectonophysics, 2002 Abstract In southern Bolivia the very thick Ordovician siliciclastic rocks of the Cordillera Oriental show folds and a slaty cleavage of pre-Cretaceous age. These deformations had previously been attributed to either the late Ordovician Ocloyic or to the late Devonian to early Carboniferous Eohercynian (Chanic) orogenies.
Klaus Wemmer
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PRE-CRETACEOUS SEDIMENTS IN CORDILLERA ORIENTAL OF COLOMBIA
AAPG Bulletin, 1941ABSTRACT Although there are scattered references in the literature to exposures of rocks of Paleozoic age in the Cordillera Oriental of Colombia, the fact that they are widespread and probably represent a good portion of the upper Paleozoic has not generally been recognized.
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The Magmatic Evolution of the Cordillera Oriental, Southeastern Peru
1984Magmatism within the Central Andean Inner Arc of the Cordillera Oriental of southeastern Peru is characterized both by its episodicity (ca. 350, 270–250, 240–230, 180, 90–70 and 26–4 Ma) and its variable chemical/petrological signature. In both respects, marked contrasts are evident with the quasi-continuous and petrochemically unified subduction ...
D. J. Kontak, A. H. Clark, E. Farrar
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Algunos peces dulceacuícolas de la Cordillera Oriental Colombiana
2023Los peces son el grupo de animales más numeroso y diverso de vertebrados del mundo, Colombia alberga el 25% (3668 especies) de los peces del mundo, ocupando el segundo lugar en diversidad de este grupo después de Brasil. Los Cerros Orientales representan una gran oferta de biodiversidad y servicios ecosistémicos para la capital y para la región Andina ...
Carlos Morales Villanueva +1 more
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Early Ordovician (Floian) ostracods from the Cordillera Oriental, Northwest Argentina [PDF]
Geological Journal, 2011 The ostracod fauna from the Floian (Lower Ordovician) strata of the Cordillera Oriental, Argentina (Acoite Formation) are documented. One new genus Acoitella and four species are recognized, two of which are new (Nanopsis victoria sp. nov. and Conchoprimitia frequens sp. nov.). The diversity of the Early Ordovician ostracod faunas of the Central Andean
Maria JOSÉ Salas
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La Cordillera Oriental Colombiana, transecto Sumapaz
2008The publication of this volume (volume 7) concludes the publication of the study of the Transects of Buritaca (Sierra Nevada de Santa Marta), Parque Los Nevados (Cordillera Central), Tatamá (Western Cordillera) and Sumapaz (Eastern Cordillera) in the Colombian Andes.
van der Hammen, T. +2 more
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Evaporite Deposits of Bogotá Area, Cordillera Oriental, Colombia
AAPG Bulletin, 1972Abstract Four evaporite-bearing stratigraphic zones are known in Cretaceous strata of the Cordillera Oriental of Colombia north and east of Bogotá. The easternmost and oldest zone is probably of Berriasian to Valanginian age. The next oldest is probably late Barremian to early Aptian in age. The third appears to be Aptian.
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A pliocene flora from the subachoque valley (Cordillera Oriental, Colombia)
Review of Palaeobotany and Palynology, 1990Abstract A palynological and macrobotanical study was made of a 40 cm long peaty clay layer (SUBA 39 section) intercalated in fluvial deposits of Pliocene age from the Subachoque Valley, located at the northwestern border of the high plain of Bogota in the Cordillera Oriental of Colombia at an elevation of 2820 m above sea level. This has permitted a
V.M. Wijninga, P. Kuhry
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Late Pliocene paleoecology of the Guasca Valley (Cordillera Oriental, Colombia)
Review of Palaeobotany and Palynology, 1993Abstract Organic-rich layers intercalated in a Late Pliocene fluvial-lacustrine sediment sequence located at 2650 m elevation in the Guasca Valley (high plain of Bogota, Cordillera Oriental, Colombia) were analysed for plant micro- and macrofossils. Paleoenvironmental reconstructions indicate that a subandean forest (lower montane), at present found ...
V.M. Wijninga, P. Kuhry
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The calanoid fauna (Crustacea, Copepoda) of the Cordillera Oriental of the Colombian Andes
Hydrobiologia, 1989Calanoid copepods belonging to four species and one subspecies from lakes and ponds mainly from the Cordillera Oriental (22) and Cordillera Central (1) of the Colombian Andes are recorded. Most of the water bodies studied are located in the ‘paramo’ region, between 2996 and 4085 m altitude.
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