Results 21 to 30 of about 53,865 (214)

Detrital zircon SHRIMP U-Pb age study of the Cordillera Darwin Metamorphic Complex of Tierra del Fuego : sedimentary sources and implications for the evolution of the Pacific margin of Gondwana [PDF]

open access: yes, 2010
The Cordillera Darwin Metamorphic Complex in the southernmost Andes includes a basement of probable Palaeozoic age, a mid-Jurassic and younger volcano-sedimentary cover, and a suite of Jurassic granites, all of which were jointly metamorphosed during the
Calderon, M.   +6 more
core   +1 more source

Geología de la cordillera Central y el occidente colombiano y petroquímica de los intrusivos granitoides mesocenozoicos

open access: yesBoletín Geológico, 1983
En este trabajo se considera la geología de las siguientes unidades morfoestructurales de Colombia: la cordillera Central, la cordillera Occidental, la Serranía de Baudó y las Depresiones interandinas del Cauca - Patía y Atrato - San Juan - Tumaco.
Alberto Jairo Álvarez
doaj   +1 more source

Early Cambrian U-Pb zircon age and Hf-isotope data from the Guasayán pluton, Sierras Pampeanas, Argentina: implications for the northwestern boundary of the Pampean arc [PDF]

open access: yes, 2016
An Early Cambrian pluton, known as the Guasayán pluton, has been identified in the central area of Sierra de Guasayán, northwestern Argentina. A U?Pb zircon Concordia age of 533 ± 4 Ma was obtained by LA-MC-ICP-MS and represents the first report of ...
Alasino, Pablo Horacio   +8 more
core   +2 more sources

Opposing shear senses in a subdetachment mylonite zone: Implications for core complex mechanics [PDF]

open access: yes, 2010
[1] Global studies of metamorphic core complexes and low‐angle detachment faults have highlighted a fundamental problem: Since detachments excise crustal section, the relationship between the mylonitic rocks in their footwalls and the brittle deformation
E. S. Platzman   +8 more
core   +4 more sources

Nueva especie de rana (Atelopus) de Los Farallones de Cali, Cordillera Occidental de Colombia

open access: yesCaldasia, 1986
Durante la realización de colecciones herpetológicas en el Departamento del Valle del Cauca, fue encontrada una especie no descrita de Atelopus (Anura: Bufonidae) en los farallones de Cali, a 2600 m de altura.
Kattan Gustavo
doaj   +2 more sources

El género Cryptocanthon (Coleoptera: Scarabaeidae) en Colombia: descripción de especies nuevas, distribución geográfica y conservación

open access: yesRevista Mexicana de Biodiversidad, 2020
Se describen 3 especies nuevas de escarabajos del género Cryptocanthon Balthasar de los Andes colombianos: C. encenillensis sp. nov. y C. cephalopunctatus sp. nov. de la cordillera oriental, y C. mailinae sp. nov. de la cordillera occidental. Se proveen
Diego Esteban Martínez Revelo   +2 more
doaj   +1 more source

Middle to Late Miocene Contractional Deformation in Costa Rica Triggered by Plate Geodynamics [PDF]

open access: yes, 2017
Contractional deformation in Costa Rica is usually attributed to the subduction of the aseismic Cocos Ridge. In this work, we review the evidences for contraction in the middle to late Miocene, prior to the arrival of the Cocos Ridge at the Middle ...
Cascante, Monserrat   +8 more
core   +1 more source

COLUMNEA FIGUEROAE, A NEW SPECIES OF GESNERIACEAE FROM LAS ORQUÍDEAS NATIONAL NATURAL PARK (ANTIOQUIA, COLOMBIA)

open access: yesCaldasia, 2014
Una nueva especie de Columnea (Gesneriaceae) hallada en un bosque premontano en el Parque Nacional Natural Las Orquídeas (Cordillera Occidental), en el departamento de Antioquia, en Colombia es descrita e ilustrada.
MARISOL AMAYA-MÁRQUEZ
doaj   +1 more source

New Record of the Brown Sac-Wing Bat, Balantiopteryx infusca (Chiroptera, Emballonuridae) in Colombia

open access: yesMammalogy Notes, 2021
Balantiopteryx infusca is a small bat endemic to southwestern Colombia and northwestern Ecuador. We present a new locality for B. infusca on the western slope of the Cordillera Occidental, Valle del Cauca, Colombia.
Jorge Horacio Velandia Perilla   +2 more
doaj   +1 more source

Modelling of last hypothesis of climate change impacts on water resources in Sierra de las Cabras aquifer (Southern Spain) [PDF]

open access: yes, 2015
Having models that reflect the reality of a system operation becomes critical to the effec-tive management of water resources in a watershed, especially considering the different scenes of climate change predicted for the Mediterranean regions by the ...
Jiménez Fernández, Pedro   +1 more
core   +1 more source

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