Results 71 to 80 of about 52,738 (228)
Evaluation of existing knowledge of the tectonic history and lithospheric structure of South America [PDF]
While data is available on the lithospheric and crustal structure of the Andes region of South America, there is limited knowledge of these aspects of the eastern portion of the continent.
Keller, G. R., Lidiak, E. G.
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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
Las gesneriáceas de los departamentos de Boyacá y Cundinamarca, Cordillera Oriental Colombiana
Acta Biológica Colombiana, 2005 Se estudiaron las gesneriáceas presentes en los departamentos colombianos de Boyacá y Cundinamarca, cordillera oriental andina. Se revisaron las colecciones depositadas en los herbarios COL, FMB y UPTC.
Laura Clavijo-R.
doaj
Colombia ForestalEste estudio analiza la composición y la diversidad florísticas de tres coberturas vegetales al norte de la Serranía de Los Yariguíes. Se establecieron 40 parcelas en tres localidades (1.6 ha muestreadas) y se censaron 2804 individuos con DAP ≥ 2.5 cm ...
Daniel Mauricio Díaz-Rueda +4 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
openaire +2 more sources
The Sierra Madre Oriental Orocline: Paleomagnetism of the Nazas Province in NE Mexico
Journal of Geophysical Research: Solid Earth, Volume 129, Issue 9, September 2024.Abstract Curved mountain belts are spectacular natural features that contain crucial 3D information about the tectonic evolution of orogenic systems in the absence of other kinematic markers. The Mesozoic units exposed in the Mexican Fold and Thrust Belt in northeastern Mexico show a striking curvature, whose kinematic history has not been studied. The
Rafael Guerra Roel +8 more
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Ecology and Evolution, Volume 14, Issue 6, June 2024.In Costa Rica, Canthidium and Onthophagus have abrupt diversity declines above 1500 m a.s.l. Endemic species showed narrower vertical distribution when compared to non‐endemic ones. Abstract Costa Rica emerged from the seas as a new geological territory during the Miocene as an insular archipelago.
Bert Kohlmann +2 more
wiley +1 more source
Provenance of Ordovician and Devonian sandstones from southern Peru and northern Bolivia - U-Pb and Lu-Hf isotope evidence of detrital zircons and its implications for the geodynamic evolution of the Western Gondwana margin (14° - 17° S) [PDF]
, 2009 In an attempt to trace the provenance of sedimentary detritus and to gain information on the crustal evolution of the Early Paleozoic western Gondwana margin (14°-17°S) we applied a combined in situ U-Pb and Lu-Hf LA-ICP-MS isotope analysis on detrital ...
Bahlburg, Heinrich +5 more
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Biota Colombiana, 2015 During an exploratory field trip, made to identify possible study areas in one of the isolated paramos north of the Arcabuco region (Boyacá, Colombia), a species of terrestrial frog assignable to the unistrigatus species group of the genus Pristimantis ...
Andrés R. Acosta-Galvis
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Revista de Investigación Agraria y Ambiental, 2011 La reforestación de especies nativas es una prioridad de nuestros ecosistemas intervenidos o severamente afectados. W. tomentosa es una planta dominante en el clímax regional y muy frecuente en los bosques montañosos del norte de la cordillera de los ...
Carmen Rosa Montes Pulido
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