Results 51 to 60 of about 204,177 (165)

El volcanismo jurásico superior de la Formación Río Damas-Tordillo (33°-35,5°S): antecedentes su sobre petrogénesis, cronología, proveniencia e implicancias tectónicas [PDF]

, 2014
Los depósitos continentales y volcánicos de la Formación Rio Damas-Tordillo, Jurásico Superior, representan un período restringido de sedimentación continental dentro del registro mayormente marino de la Cuenca Neuquina.
Calderón, Sergio, Charrier González, Reynaldo, Ducea, Mihai Nicolae, Hoffman, Derek, Mescua, Jose Francisco, Oliveros, Verónica, Rossel, Pablo, Tapia, Felipe   +7 more
core   +2 more sources

Let the Poor Talk About “Poverty”: Revisiting Poverty Alleviation in Rural China With Machine Learning

Poverty &Public Policy, Volume 17, Issue 2, June 2025.
ABSTRACT To tackle lasting rural poverty and fully eradicate absolute poverty by 2020, the Chinese government introduced the “targeted poverty alleviation” (TPA) policy in 2013. Quantitative assessments prove the policy's success; yet multidimensional aspects and subjective perceptions of rural poverty are insufficiently accounted for.
Lisa Hoeschle, Shuang Liu, Xiaohua Yu
wiley   +1 more source

Estudio sistemático de los Foraminíferos bentónicos de las arenas fosilíferas del plioceno de Huelva: su significado paleológico

Estudios Geologicos, 1989
Los Foraminíferos bentónicos son muy representativos de los materiales del Neógeno en el sector occidental de la Cuenca del Guadalquivir. Las variaciones en las proporciones de las distintas especies son la base del estudio paleoecológico realizado en el
M. L. González-Regalado
doaj   +1 more source

Sector Secundario Nicaraguense : Comportamietno de la explotación de materiales metalicos oro y plata en la económia Nicaraguense (2007-2015) [PDF]

, 2017
En esta investigación hacemos referencia a la explotación de oro y plata en Nicaragua, una actividad que se ha venido realizando desde antaño, y que, con el paso del tiempo ha tomado importancia en el sector secundario.
Alvarado Salmerón, Christopher Harry, Vallejos Guido, Ligia Isil   +1 more
core  

Across-arc geochemical variations in the Southern Volcanic Zone, Chile (34.5- 38.0°S): Constraints on Mantle Wedge and Input Compositions [PDF]

, 2012
Crustal assimilation (e.g. Hildreth and Moorbath, 1988) and/or subduction erosion (e.g. Stern, 1991; Kay et al., 2005) are believed to control the geochemical variations along the northern portion of the Chilean Southern Volcanic Zone.
Aitcheson, Amante, Andres, Angermann, Auer, Ayers and Watson, Behn, Bertotto, Bindeman, Bindeman, Bindeman, Blichert-Toft, Cembrano, Contreras-Reyes, Contreras-Reyes, D. Garbe-Schönberg, Davidson, Davidson, Douglass, Dungan, Dungan, Eiler, Elliot, Ewart, F. Hauff, Feeley, Folguera, Fontignie, Fontignie, Francis, Francis, Futa, G. Jacques, Garbe-Schönberg, Geldmacher, Gilbert, Gill, Govindaraju, Green, Green, Grevemeyer, Gudnason, H. Wehrmann, Haase, Hall, Hamelin, Hanan, Hanan, Harmon, Hauff, Hermann, Herron, Heydolph, Hickey, Hickey, Hickey-Vargas, Hickey-Vargas, Hildreth, Hildreth, Hochstaedter, Hoernle, Hoernle, Hofmann, Husson, I. Bindeman, Ito, Ito, J. Gill, Johnson, K. Hoernle, Katz, Kay, Kay, Kay, Kay, Kay, Kelley, Kelley, Kessel, Kimura, Kimura, Kingsley, Klimm, Krolikowska-Ciaglo, L.E. Lara, Le Maitre, Lindsay, Lucassen, Lucassen, López-Escobar, MacDougall, Mahoney, Martin, Mattey, Morris, Munoz, Naranjo, Newsom, Norabuena, P. van den Bogaard, Pearce, Pearce, Plank, Potts, Ramos, Ranero, Ranero, Ranero, Roy-Barman, Rüpke, Rüpke, Schmitt, Schmitt, Sellés, Sigmarsson, Sigmarsson, Stern, Stern, Stern, Sun, Syracuse, Syracuse, Tassara, Tebbens, Tebbens, Todd, Tollstrup, Tollstrup, Tormey, Tormey, Turner, Valley, Vallier, Van Keken, Varekamp, Vervoort, Vervoort, Völker, Völker, Wade, White, Woodhead, Woodhead, Workman, Wörner, Yododzinski, Yuan, Zhang   +147 more
core   +1 more source

Hydrological Connectivity Enhances Fish Biodiversity in Amazonian Mining Ponds: Insights From eDNA and Traditional Sampling

Molecular Ecology, Volume 34, Issue 11, June 2025.
ABSTRACT Artisanal and small‐scale gold mining (ASGM) expansion in the Madre de Dios region of the Peruvian Amazon has transformed primary forests into a novel wetland complex of thousands of abandoned mining ponds. Despite their ecological relevance, post‐mining recovery of these systems remains understudied, particularly regarding fish biodiversity ...
Camila Timana‐Mendoza, Alonso Reyes‐Calderón, Patrick Venail, Ricardo Britzke, Monica C. Santa‐Maria, Julio M. Araújo‐Flores, Miles Silman, Luis E. Fernandez   +7 more
wiley   +1 more source

Effects of Regional Stress State and Pore Fluid Pressure on the Onset and Style of Caldera Collapse

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 5, May 2025.
Abstract Collapse calderas result from subsidence of a magma reservoir roof during large‐volume eruptions. Whilst calderas form in various tectonic settings, it is unclear how regional (“far‐field”) forces influence caldera fault nucleation, orientation and architecture.
Matías A. Villarroel, Martin P. J. Schöpfer, John Browning, Eoghan P. Holohan, Claire E. Harnett, Carlos J. Marquardt, Pamela P. Jara   +6 more
wiley   +1 more source

Abandoned mine land program: Examining public participation in decision‐making

Review of Policy Research, Volume 42, Issue 3, Page 629-657, May 2025.
Abstract For centuries, coal extraction and production provided low‐cost energy that powered the American economy. Currently, an estimated 5.5 million people in the Appalachian region live within one mile of an Abandoned Mine Land (AML) site. The site remediation has been funded and promoted by the AML program under the Surface Mining Control and ...
Karsyn Kendrick, Younsung Kim
wiley   +1 more source

La minería de datos, entre la estadística y la inteligencia artificial [PDF]

, 2001
En la pasada década hemos asistido a la irrupción de un nuevo concepto en el mundo empresarial: el data mining (minería de datos). Algunas empresas han implementado unidades de minería de datos estrechamente vinculadas a la dirección de la empresa y en ...
Aluja, Tomàs
core   +3 more sources

Implicaciones etologicas y significado de la estereotipicidad de Oichnus Bromley durante el plioceno en la cuenca del bajo Guadalquivir (SO España)

Estudios Geologicos, 1990
El estudio de la estereotipicidad de las perforaciones del tipo Oichnus Bromley, realizado sobre representantes de Bivalvia (epi e infauna) en diferentes horizontes estratigráficos del Plioceno del sector SO de la Cuenca del Guadalquivir ha permitido ...
E. Mayoral
doaj   +1 more source