Results 41 to 50 of about 3,674 (182)

The First Archaeomagnetic Age at Tiwanaku and Implications for Dating Andean Metallurgical Furnaces

Archaeometry, EarlyView.
ABSTRACT This paper presents the first archaeomagnetic dating at Tiwanaku (Andean Altiplano). We compared the geomagnetic field values recorded by a metallurgical furnace against an updated SHAWQ2k‐SH global model and a regional intensity curve, both of which include, for the first time, high‐quality intensity data from the Southern Hemisphere. Results
Judit del Río, Pablo Cruz, Miriam Gómez‐Paccard, Alicia Palencia‐Ortas, Marina Puente‐Borque, F. Javier Pavón‐Carrasco, Erik Marsh   +6 more
wiley   +1 more source

Methodological guide for ethnobotanical study of forest species in Amazonian and related communities

Revista Cubana de Ciencias Forestales, 2019
The ethnobotanical study is carried out due to the accelerated loss of traditional knowledge, forest degradation and natural habitats in Amazonian communities.
Yoel Rodríguez Guerra, María Adela Valdés Sáenz, Hiram Hernández Ramos, Sandra Soria Re   +3 more
doaj  

Darwin, el Planeta Tierra, las otras tierras y los profesores de ciencias

Contextos Educativos. Revista de Educación, 2013
Las conmemoraciones ofrecen oportunidades didácticas. En 2009 han coincidido las referidas a Darwin y a Galileo, que casi han solapado con la declaración de 2008 como el Año Internacional del planeta Tierra. Aparentemente heterogéneas, estas celebraciones presentan un hilo conductor común, útil para una reflexión de fondo sobre la enseñanza de la ...
openaire   +3 more sources

Las redes de teleflujos y su estructuración territorial en España: Los flujos telefónicos.

Estudios Geográficos, 1990
El objetivo fundamental del trabajo es analizar la configuración del territorio español en grandes áreas a partir de la interacción espacial de los flujos telefónicos.
Joana María Seguí Pons, Climent Picornell Bauza, Joana María Petrus Bey   +2 more
doaj   +1 more source

Lack of Population Structure of an Extreme Migratory Shorebird: Evidence of Gene Flow Between Geographically Disparate Populations

Ecology and Evolution, Volume 16, Issue 3, March 2026.
Gene flow is key to understand the population connectivity of a given species, specially when small and segregated populations threaten its conservation. In this study we explored the population structure of the Hudsonian Godwit (Limosa haemastica), a long‐distance migratory shorebird.
Camila Gherardi‐Fuentes, Jorge Ruiz, Nathan R. Senner, James A. Johnson, José A. Masero, Josefina Gutiérrez, Claudio Verdugo, Juan G. Navedo   +7 more
wiley   +1 more source

Unraveling the effects of wet and dry areas on carbon emissions in an intermittent Mediterranean stream

Limnology and Oceanography, Volume 71, Issue 3, March 2026.
Abstract Stream hydrological regimes are increasingly altered by water extraction, land‐use change, and climate change, leading to prolonged streambed desiccation in many regions. These alterations significantly impact biogeochemical processes within stream networks.
Alba Camacho‐Santamans, Biel Obrador, Camille Minaudo, Lídia Cañas, Yao Wang, Fernanda Mejía‐Peralta, João M. M. Bega, Jorge J. Montes‐Pérez, Daniel von Schiller   +8 more
wiley   +1 more source

Aplicación de la geometría fractal en las ciencias de la tierra

, 2022
El estudio de las diversas metodologías para la medida, en primera instancia, y el entendimiento, en segunda, de los cuerpos y comportamientos complejos que se observan en la naturaleza que nos rodea, son abordados en esta tesis desde el punto de vista de la geometría fractal. Este estudio abarca, dentro de lo posible, un amplio rango, sobre diferentes
openaire   +2 more sources

Reconstruction of Core‐Surface Flows During the Last 3,300 Years

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.
Abstract Understanding the Earth's magnetic field evolution requires examining the fluid flow at the core‐mantle boundary that drives the changes over different timescales. The inversion process to derive core‐surface flow velocities from secular variation data encounters non‐uniqueness issues, necessitating a priori assumptions that yield different ...
Pablo Rivera, F. J. Pavón‐Carrasco, M. L. Osete   +2 more
wiley   +1 more source

Efecto del contenido de azufre sobre la meteorización del carbón: comparación de dos mantos en Hato de la Virgen (Fm. Carbonera), Venezuela

Estudios Geologicos, 2000
Diez muestras de carbón bituminoso, presentando diferentes niveles de meteorización, fueron colectadas a diferentes profundidades de dos minas subterráneas ubicadas en la localidad de Hato de la Virgen, Estado Táchira, Venezuela: la galería G-ll, donde ...
M. Martínez, M. Escobar, I. Esteves, R. González, F. Galarraga   +4 more
doaj   +1 more source

Characterization of the Nature of Organic Matter in Carbonate Rocks: Implications for Geological and Environmental Studies

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 3, March 2026.
Abstract Organic matter in carbonate rocks plays a crucial role in processes such as fluid flow regulation, carbon sequestration, contaminant transport, and hydrocarbon recovery. This study employed multimodal spectroscopic techniques, including fluorescence imaging and Fourier transform infrared (FTIR) spectroscopy, to characterize the spatial ...
Alicia Moya, Rajkumar Chowdhury, Yves Perrette, Fabienne Giraud, Laurent Charlet, Christophe Sandt, Hugo Chauvet, Frederic Jamme, Alexander Van Driessche, Alejandro Fernandez‐Martinez   +9 more
wiley   +1 more source