Results 81 to 90 of about 120,177 (175)

Meiotic behavior of two polyploid species of genus Pleurodema (Anura: Leiuperidae) from central Argentina [PDF]

open access: yes, 2014
Polyploidy is an important evolutionary force but rare in vertebrates. However, in anurans, the genus Pleurodema has polyploid species, two of them tetraploid and one octoploid.
Grenat, Pablo Raúl   +4 more
core   +2 more sources

MISS diversity from saline lakes of Brazilian Pantanal: Origin, potential of preservation and comparison with examples of the Ediacaran‐Cambrian shallow depositional settings

open access: yesSedimentology, EarlyView.
ABSTRACT One of the largest wetlands on Earth, the Brazilian Pantanal contains roughly 10 000 natural lakes, about 1000 of which are hypersaline. In these environmentally stressful settings, animal life struggles to survive, while cyanobacteria form extensive mats.
Lucas V. Warren   +5 more
wiley   +1 more source

Identificación de geositios en el valle de Tafí, provincia de Tucumán, Argentina y su análisis como instrumentos para comprender la historia geológica de la región

open access: yesCuadernos de Geografía: Revista Colombiana de Geografía
Los geositios son afloramientos representativos desde el punto de vista científico, pedagógico, cultural y turístico que permiten reconocer procesos geológicos que participaron en la evolución de una región.
José Pablo López   +3 more
doaj   +1 more source

Applications of continuum physics to geological problems / D.L. Turcotte y G. Schubert.

open access: yesGeofísica Internacional, 1986
Los doctores Turcotte y Schubert se han distinguido por sus diversos estudios acerca del proceso de convección en el interior de la Tierra, mediante el empleo de los principios de la Física del Medio Continuo y de la Dinámica de Fluidos.
F. Medina Martínez
doaj   +1 more source

Ofiuroideos del Cretácico Inferior de Patagonia: primer registro fósil articulado para el Mesozoico de América del Sur [PDF]

open access: yes, 2019
The first articulated remains of ophiuroids for the Mesozoic of South America are described from the Lower Cretaceous of Neuquén Basin, Argentina.
Comerio, Marcos   +6 more
core   +2 more sources

Climate conditions on the South‐Iberian Palaeomargin during the latest Pliensbachian to early Toarcian: A mineralogical and geochemical study from hemipelagic deposits

open access: yesSedimentology, EarlyView.
ABSTRACT The integrated analysis of lithofacies, mineralogy and geochemistry of the hemipelagic marine succession exposed in La Cerradura section (South‐Iberian Palaeomargin) provides new information to characterise the palaeoenvironmental conditions during the latest Pliensbachian to early Toarcian, including the Jenkyns Event.
Chaima Ayadi   +4 more
wiley   +1 more source

Geología y geoquímica del granito de Montánchez (Cáceres)

open access: yesEstudios Geologicos, 1989
El macizo granítico de Montánchez (Cáceres, España) está situado al SE del granito de Albalá, del que le separa una banda fuertemente tectonizada. De acuerdo con su contenido en micas se han distinguido en él tres facies petrográficas.
R. M. Reguilón Bragado   +1 more
doaj   +1 more source

Unconventional Fiscal Policies in Response to Inflation: The Iberian Exception in Portugal

open access: yesScottish Journal of Political Economy, EarlyView.
ABSTRACT The surge in Eurozone inflation in 2022 compelled European governments to implement unconventional fiscal policies. One initiative, the Iberian Exception, imposed a cap on the cost of natural gas used for electricity generation in Portugal and Spain.
Lourenço Cerdeira   +2 more
wiley   +1 more source

Contribución del Profesor Johannes Brüggen a la geología en Chile

open access: yesRevista del Museo de La Plata, 2016
El Profesor Johannes Brüggen Messtorff (1887-1953) fue quien, con el libro Fundamentos de Geología de Chile (1950), trazó una primera visión integrada de la geología chilena, que refunde el conocimiento adquirido en 40 años de investigación.
Reynaldo Charrier   +2 more
doaj   +1 more source

A Global Review of Microplastic Contamination in Groundwater: Empirical Evidence and Latin American Perspectives

open access: yesWater and Environment Journal, EarlyView.
ABSTRACT The presence of microplastics (MPs) in groundwater has emerged as a significant concern due to their environmental impact and the threat they pose to vital water resources, groundwater being one of the most important freshwater sources in the world.
Lara Luiza de Oliveira Pompermayer   +7 more
wiley   +1 more source

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