Results 21 to 30 of about 6,643 (165)
Geofísica Internacional, 1987 Los estudios petrográficos, macroquímicos y por microsonda de una secuencia de rocas del Volcán El Chichón, Chiapas, México, indican que los materiales “juveniles” de las erupciones de 1982 y las anteriores presentan esencialmente la misma química y la ...
J. J. Macgee +2 more
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Estudios Atacameños, 2005 La cerámica de estilo Aguada Portezuelo del Noroeste Argentino posee un amplio repertorio de técnicas de acabado empleadas principalmente en los tratamientos de superficie y decoración.
Guillermo A. De La Fuente +3 more
doaj +2 more sources
Application of the fluorescence light microscopy in the textural study of portland cement clinker
Materiales de Construccion, 1987 The application of fluorescence light microscopy in the textural study of Portland cement clinker, specially its porosity, is presented. Principles and types of the technique are commented and the suggested sample preparation method is described. The use
Ángel Rodríguez Rey +4 more
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Informes de la Construccion, 1994 Se realiza la descripción e inventario de las principales formas de alteración desarrolladas sobre la caliza de Hontoria, empleada en la construcción de la Catedral de Burgos, aportando una exhaustiva información gráfica de las mismas, así como de su ...
F. J. Alonso +2 more
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Petrología sedimentaria. Notas de teoría. 1. Introducción [PDF]
, 2010 La Petrología Sedimentaria es la ciencia que estudia todos sedimentos y rocas que se generan en ambiente exógeno y por tanto todos los procesos que conducen a la formación de dichas rocas y sedimentos.
Alonso-Zarza, Ana María
core +1 more source
Palaeontology, Volume 69, Issue 2, 2026.Abstract There is a growing consensus that pterosaurs and the flightless Lagerpetidae are closely related. This relationship is supported by apomorphies throughout the skeleton, including endocranial character states such as a well‐developed floccular fossa and a tall anterior semicircular canal. Our knowledge of lagerpetid anatomy has been improved by
Lísie V.S. Damke +6 more
wiley +1 more source
Materiales de Construccion, 1987 The suitability of some consolidating and protecting products, to be applied to the deteriorated calcareous stones of the Cathedral of Oviedo, is presented. A proposed procedure and methodology for evaluating that suitability is also described.
Rosa M. Esbert +2 more
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ChemSystemsChem, Volume 8, Issue 1, January 2026.XX XX ABSTRACT The pharaoh's serpent reaction, the thermodecomposition of mercury thiocyanate in air, is a classic chemical demonstration. We analyse and characterize the reaction products, composed of two different phases, graphitic carbon nitride, C3${\rm C} _3$N4${\rm N} _4$, and metacinnabar, HgS.
Carlos Pimentel +4 more
wiley +1 more source
, 1982 En esta Hoja se han distinguido cuatro unidades cartográficas y petrográficas de importancia cuantitativa desigual, puesto que las formaciones graníticas situadas al oeste de Cáceres y el manchón granítlco situado al sur de las localidades de Torreorgaz ...
Ruíz García, Casilda
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Palagonitization of Volcanic Rocks in Polar Climates: The Case of Deception Island (Antarctica)
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 12, December 2025.Abstract A detailed study of palagonitization in rocks from Deception Island—one of Antarctica's most active volcanoes—has been performed to advance our understanding of this alteration process. A detailed petrographic (optical and SEM), mineralogical (XRD), and mineral and glass spot geochemistry (EDS and EMP) characterization has been conducted on ...
Oriol Vilanova‐Pagès +10 more
wiley +1 more source