Results 51 to 60 of about 171,693 (169)

Petroquímica del volcanismo básico de la Cordillera Occidental (Informe Preliminar)

, 1979
This paper reports the preliminary results of a study of volcanic rocks of the Cordillera Occidental. Using the results of 58 analyses, mayor and minor element chemistry, of rocks with a wide geographic distribution, it has been found that they are of ...
Ortíz B., Franklin, Ortiz, Franklin
core   +1 more source

Dos nuevas especies de Otoba (Myristicaceae, Viroleae) de las tierras bajas del Pacífico y los Andes centrales y occidentales de Colombia

Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales
Se describen dos nuevas especies de Otoba: O. monsalveae de bosques muy húmedos del Pacífico colombiano y el piedemonte occidental de la cordillera occidental (departamentos de Chocó y Valle del Cauca), y O.
Daniel Santamaría-Aguilar, Boris Villanueva-Tamayo, Manuel Luján   +2 more
doaj   +1 more source

La sombra alargada del patrón: Gamonalismo y hábitos hacendatarios en Chimborazo tras la reforma agraria

The Journal of Latin American and Caribbean Anthropology, Volume 29, Issue 4, Page 352-363, December 2024.
Abstract This paper explores selective aspects of the historical processes of organization of the kichwa peasantry in the Andes of Ecuador. Based on the analysis of two representative cases of confrontation between peasants and landowners over access to land in the province of Chimborazo, it discusses the relevance of the concept of “gamonalismo” as ...
Víctor Bretón
wiley   +1 more source

Neoproterozoic ultramafic and mafic magmatism in the Eastern Cordillera of the central peruvian Andes: the Tapo Massif [PDF]

, 2010
A highly dismembered assemblage of ultramafic and mafic rocks is exposed in the Eastern Cordillera of the Central Peruvian Andes, extending along a discontinuous NW-SE belt over some 250 km between 12° and 9° S of latitude.
Acosta, Jorge, Castroviejo Bolibar, Ricardo, Acosta Ale, Jorge Gilberto, Tassinari, Colombo G., Pereira, Eurico, Tassinari, Colombo Celso Gaeta, Rodrigues, José Feliciano, Rodrigues, Jose F.   +7 more
core  

A neoproterozoic age for the chromitite and gabbro of the Tapo Ultramafic Massif, Eastern Cordillera, Central Peru, and its tectonic implications [PDF]

, 2011
The ultramafic-mafic rocks of the Tapo Complex are exposed in the Eastern Cordillera of the Central Peruvian Andes. This complex is composed of serpentinised peridotites and metabasites with some podiform chromitite lenses and chromite disseminations and
Acosta, Jorge, Pereira, Eurico, Tassinari, Colombo Celso Gaeta, Jose F. Rodrigues, Rodrigues, Jose F., Eurico Pereira, Ricardo Castroviejo, Castroviejo Bolibar, Ricardo, Acosta Ale, Jorge Gilberto, Tassinari, Colombo G., Jorge Acosta, Colombo C.G. Tassinari, Rodrigues, José Feliciano   +12 more
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The origin of planar lamination in fine‐grained sediment deposited by subaqueous sediment gravity flows

The Depositional Record, Volume 10, Issue 5, Page 496-514, November 2024.
Microscopic analysis of ancient planar‐laminated strata deposited in environments ranging from continental glaciolacustrine to the deep sea consists of a repeating alternation of sub‐millimetre‐thick, sharply bounded silt‐rich and clay‐rich layers. The origin of this interlayering is interpreted to be due to alternating physical processes related to ...
Omar N. Al‐Mufti, R. William C. Arnott
wiley   +1 more source

Características metalogenéticas de la Cordillera Occidental en la región Ancash [PDF]

, 2010
El área de estudio se localiza en el centro del Perú, entre los paralelos 9º-10º 30’ de latitud sur y 78º–77º de longitud Oeste. Morfológicamente comprende la Cordillera Occidental, en la que se diferencia la Cordillera Negra al Oeste y la Cordillera ...
Villarreal Jaramillo, Eder, Rivera Cornejo, Raymond, Santisteban Angeldonis, Alexander   +2 more
core  

BATOLITO DE SABANALARGA, PLUTONISMO DE ARCO EN LA ZONA DE SUTURA ENTRE LAS CORTEZAS OCEÁNICA Y CONTINENTAL DE LOS ANDES DEL NORTE

Boletín de Ciencias de la Tierra, 2012
El Batolito de Sabanalarga es a un cuerpo alargado de 410 Km2 que se extiende entre las Cordilleras Central y Occidental de Colombia, intruye en el borde occidental la Formación Barroso y las Diabasas de San José de Urama y en el borde oriental las rocas
GABRIEL RODRÍGUEZ G., MARÍA ISABEL ARANGO, JOSÉ GILBERTO BERMÚDEZ   +2 more
doaj  

Modulation of Deformation by Magmatic Tempo, Coast Mountains Batholith, British Columbia, Canada

Tectonics, Volume 43, Issue 11, November 2024.
Abstract The tectonomagmatic evolution of the southern Coast Mountains batholith, British Columbia reveals the relation of magmatic tempo, deformation, and relative plate motions which inform models for growth of continental crust and convergent plate dynamics.
Margaret E. Rusmore, Glenn J. Woodsworth, M. Robinson Cecil, Harold H. Stowell, Elizabeth Bollen, George E. Gehrels, Marty Grove, Pinkie Young   +7 more
wiley   +1 more source

Una nueva especie de Palicourea (Rubiaceae) de Colombia

Caldasia, 1997
Palicourea frontinoensis, a new species from western cordillera in Colombia, is described and ilustrated. The affinities of the new taxon with Palicourea bella (Standley) Dwyer and Palicourea spathacea C. M.
Gogollo P. Alvaro, Taylor Charlotte M.
doaj