Results 41 to 50 of about 888 (186)

Description and terrestrial ages of the Calama Area Meteorite Collection (Atacama Desert, Chile)

Meteoritics &Planetary Science, EarlyView.
Abstract We present a comprehensive study of a meteorite collection from the Atacama Desert (Chile), the driest and most climatically stable desert in the world. This collection includes meteorites from three adjacent Dense Collection Areas (DCAs) in the northern part of the Atacama Desert: Calama, Sierra Gorda, and Chug Chug, referred to as the ...
Carine Sadaka, Jérôme Gattacceca, Florian Dumas, Régis Braucher, ASTER Team, Matthieu Gounelle, Dilyara Kuzina, Cyril Lorenz, Alexandre Corgne, Pierre Sempéré   +9 more
wiley   +1 more source

Floral adaptation and modular trait evolution associated with a shift from bee to hummingbird pollination

Plant Biology, EarlyView.
By comparing floral trait variation, integration and modularity in two sister species of Neotropical Costus with a pollination shift, we show that, despite pollination syndrome divergence, both species exhibit low floral variation and functional modularity, consistent with pollinator‐driven selection on traits mediating pollen transfer efficiency and ...
P. Juárez, K. M. Kay
wiley   +1 more source

Aplicación del análisis de paleoesfuerzos a regiones plegadas: la compresión terciaria en el sector de Cariñena-Belchite (borde norte de la Cordillera Ibérica)

Estudios Geologicos, 1996
La aplicación del análisis de paleoesfuerzos a las mesoestructuras frágiles (fundamentalmente fallas y picos estilolíticos) del borde norte de la Cordillera Ibérica en el sector de Cariñena-Belchite ha dado como resultado la determinación de cuatro ...
A. L. Cortés Gracia, A. M. Casas Sainz
doaj   +1 more source

Nuevos antecedentes estratigráficos y geocronológicos para el Meso-Cenozoico de la Cordillera Principal de Chile entre 32° y 32°30’S: Implicancias estructurales y paleogeográficas [PDF]

Andean Geology, 2014
New stratigraphical and geochronological constraints for the Mezo-Cenozoic deposits in the High Andes of central Chile between 32° and 32°30’S: Structural and palaeogeographic implications. Attempts to differentiate geological units of the Andean Principal Cordillera, between 31°30’S and 33°S, faced several problems until very recently.
Jara, Pamela, Charrier, Reynaldo
openaire   +3 more sources

Elevational variation in heart mass and suppression of hypoxia‐induced right ventricle hypertrophy in Andean leaf‐eared mice (Phyllotis)

The Journal of Physiology, EarlyView.
Abstract figure legend In lowland mammals that ascend to high elevation, hypoxia‐induced changes in the pulmonary circulation can give rise to hypoxic pulmonary hypertension (HPH) and associated right‐ventricle (RV) hypertrophy. Andean mice with broad elevational ranges have greater heart mass relative to body size at higher elevations, but they ...
Naim M. Bautista, Nathanael D. Herrera, Marcial Quiroga‐Carmona, Chandrasekhar Natarajan, Adriana Rico‐Cernohorska, Jorge Salazar Bravo, Graham R. Scott, Guillermo D'Elía, Zachary A. Cheviron, Jay F. Storz   +9 more
wiley   +1 more source

Detrital zircon typology and U/Pb geochronology for the Miocene Ladrilleros-Juanchaco sedimentary sequence, Equatorial Pacific (Colombia): New constraints on provenance and paleogeography in northwestern South America

Geologica Acta, 2017
Typology and internal texture analyses were performed on detrital zircons obtained from the Miocene sandstones of the Ladrilleros-Juanchaco sedimentary sequence (Colombia, Equatorial Pacific).
E. OSORIO-GRANADA, S.A. RESTREPO-MORENO, J.A. MUÑOZ-VALENCIA, R.A. TREJOS-TAMAYO, A. PARDO-TRUJILLO, A.A. BARBOSA-ESPITIA   +5 more
doaj  

Cascading effects of glacier retreat: Hydro-chemical shifts and macroinvertebrate responses in Andean glacier-fed streams [PDF]

Journal of the Bulgarian Geographical Society
The retreat of tropical glaciers in the Peruvian Andes, particularly in the Cordillera Blanca, has significantly altered hydrogeological and geochemical processes in mountain water-sheds.
Fiorella La Matta Romero, Vanessa Arevalo-Seijas, David Valqui-Peña, Moya MacDonald, Jemma Wadham, Raul Loayza-Muro   +5 more
doaj   +3 more sources

Fission track thermochronology of Neogene plutons in the Principal Andean Cordillera of central Chile (33-35°S): Implications for tectonic evolution and porphyry Cu-Mo mineralization Termocronología mediante trazas de fision de plutones neógenos en la Cordillera Principal Andina de Chile central (33-35°S): Implicancias para la evolución tectónica y mineralización de pórfidos de Cu-Mo

Andean Geology, 2009
Apatite fission track data for Miocene plutons of the western slope of the Principal Andean Cordillera in central Chile (33-35°S) define a distinct episode of enhanced crustal cooling through the temperature range of the apatite partial annealing zone ...
Víctor Maksaev, Francisco Munizaga, Marcos Zentilli, Reynaldo Charrier   +3 more
doaj  

Elevation shapes alpine snow algal blooms and their influence on albedo reduction

New Phytologist, Volume 251, Issue 5, Page 2482-2496, September 2026.
Graphical summary of elevational trends in Sanguina‐dominated snow algal blooms. Increasing elevation was associated with larger cells, lower Chla content per cell, higher astaxanthin ratios, lower snow water content, and reduced cell‐normalized albedo, whereas algal cell density showed no consistent elevational trend.
Pablo Almela, Scott Hotaling, J. Joseph Giersch, Helena C. L. Klip, James J. Elser, Trinity L. Hamilton   +5 more
wiley   +1 more source

Extensional stresses in the Colombian Eastern Cordillera fold-and-thrust belt (northern Andes): insights from 2D finite element modeling

Geologica Acta, 2009
Deformation and stress characteristics in the upper crust of the fold-and-thrust belt in the Colombian Eastern Cordillera were investigated by numerical analysis.
R. ISLAM, D. HAYASHI
doaj