Results 31 to 40 of about 488,094 (231)

Características morfológicas y cristalográficas del grafito de Osumita, Venezuela, y su uso como geotermómetro

open access: yesEstudios Geologicos, 2003
Muestras representativas del grafito diseminado del Cerro Osumita, Estado Cojedes, Venezuela, fueron objeto de un estudio morfológico, petrográfico y cristalográfico, con el fin de establecer el grado de cristalinidad del mineral y la temperatura máxima ...
M. Martínez   +5 more
doaj   +1 more source

Análisis de elementos traza en braquiópodos del Jurásico Inferior del Paleomargen Sud-Ibérico (SE de España). Correlación con las señales bióticas e implicaciones ambientales en torno al Evento de Extinción Masiva del Toarciense inferior

open access: yesEstudios Geologicos, 2021
En el Jurásico Inferior se registran diversos eventos críticos que influyeron significativamente en los ecosistemas marinos del Tethys occidental. Entre las comunidades bentónicas, en el Paleomargen Sudibérico, los braquiópodos se vieron particularmente ...
José Francisco Baeza-Carratalá   +4 more
doaj   +1 more source

Estimating the mass of CMEs from the analysis of EUV dimmings [PDF]

open access: yes, 2019
Context. Reliable estimates of the mass of coronal mass ejections (CMEs) are required to quantify their energy and predict how they affect space weather.
Balmaceda, Laura Antonia   +4 more
core   +1 more source

Unidades tectónicas y estructura del sector meridional de Sierra Espuña (Cordillera Bética, Murcia)

open access: yesEstudios Geologicos, 2000
En la parte sur de Sierra Espuña existen cinco unidades tectónicas, la superior del complejo Maláguide, debajo tres de carácter intermedio y en posición inferior una unidad alpujárride. Varias escamas tectónicas descritas en anteriores trabajos dentro de
C. Sanz de Galdeano   +2 more
doaj   +1 more source

South American dust signature in geological archives of the Southern Hemisphere [PDF]

open access: yes, 2014
Patagonian dust is the darling of researchers of paleoclimatic variability of southern South America. However, new chemical data from yet unexplored dust source areas allows for deeper investigation of the geological archives in the region.Fil: Gili ...
Gaiero, Diego Marcelo, Gili, Stefania
core  

Lithospheric 3D gravity modelling using upper-mantle density constraints: Towards a characterization of the crustal configuration in the North Patagonian Massif area, Argentina [PDF]

open access: yes, 2017
The North Patagonian Massif is an Argentinean plateau that has an average height of 1200 m and stands from 500 to 700 m above the neighboring areas. During Paleogene, it suffered a sudden uplift of more than 1200 m without noticeable internal deformation;
Aragon, Eugenio   +5 more
core   +2 more sources

Unveiling human–wildlife interactions in the context of livestock grazing abandonment and the return of large carnivores, ungulates and vultures: A stakeholder perspective

open access: yesPeople and Nature, EarlyView.
Abstract Pastoral practices remain a widespread economic activity across European mountain regions. However, the viability of this activity may be threatened by the recovery of large wild vertebrates associated with passive rewilding, leading to the so‐called human–wildlife conflicts.
P. Acebes   +4 more
wiley   +1 more source

Exotic accessory minerals in layered chromitites of the Campo Formoso complex (Brazil) [PDF]

open access: yes, 2006
The Campo Formoso stratiform intrusive complex, in Bahia State, Brazil, considered to be of Paleoproterozoic age, consists of a tabular body of ultramafic rocks about 40 km long and 100-1100 m wide.
Garuti, G.   +3 more
core   +2 more sources

Participatory fuzzy cognitive modelling reveals leverage points for agroecological adoption in the Central Valleys of Oaxaca

open access: yesPeople and Nature, EarlyView.
Abstract Global institutions are increasingly calling for an agroecological transition of our food systems to promote sustainable farmer livelihoods, safeguard agrobiodiversity and foster socio‐ecological resilience to a changing climate. Yet adoption remains limited, and there is a paucity of research examining how local conditions enable and ...
Gabriela Marie Garcia   +5 more
wiley   +1 more source

Peak characteristics of F2 region over Tucumán: Predictions and measurements [PDF]

open access: yes, 2008
Ionosonde measurements obtained at Tucuman are used to check the validity of the International Reference Ionosphere model to predict the maximum electron density of F2 region (NmF2) and its height (hmF2) over this station. Data corresponding to different
Ezquer, Rodolfo Gerardo   +3 more
core   +1 more source

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