Results 31 to 40 of about 497 (116)

Estructura y organización de las coladas submarinas: características de las lavas almohadilladas de edad cretácica que afloran en la Cordillera Vasco- Cantábrica

open access: yesEstudios Geologicos, 1999
Durante el Cretácico superior se desarrolló en la Cuenca Vasco-Cantábrica una importante actividad volcánica submarina de naturaleza alcalina. Este vulcanismo estuvo relacionado con el funcionamiento de un rift y/o una falla transformante en corteza ...
M. Carracedo, F. J. Larrea, A. Alonso
doaj   +1 more source

Palagonitization of Volcanic Rocks in Polar Climates: The Case of Deception Island (Antarctica)

open access: yesGeochemistry, 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

La erupción de El Charco de 1712 (Cumbre Vieja, La Palma). Nuevas aportaciones petrográficas y mineralógicas.

open access: yesGeogaceta
La erupción volcánica de 1712, de El Charco, es una de las peor conocidas de las 8 erupciones históricas de la isla de La Palma. Fue un evento principalmente estromboliano, con fases hidromagmáticas, durante el cual se abrieron múltiples bocas a lo ...
Nicolás Chicharro   +3 more
doaj   +1 more source

Evaluation of bricks durability using destructive and nondestructive methods (DT and NDT)

open access: yesMateriales de Construccion, 2003
We have studied the physical-mechanical behaviour of solid bricks treated with consolidants and/or water-repellents in accelerated aging tests to determine their durability.
G. Cultrone   +3 more
doaj   +1 more source

Gipsgärten: Selbstorganisierte röhrenförmige Strukturen aus Calciumsulfat mit Relevanz für die Suche nach außerirdischem Leben

open access: yesAngewandte Chemie, Volume 137, Issue 48, November 24, 2025.
Chemische Gärten sind selbstorganisierte abiotische Strukturen mit „lebensähnlichen” Formen. Hier zeigen wir, dass solche Prozesse auch nach Zugabe konzentrierter Sulfatlösungen zu festen Calciumsalzen ablaufen und sogenannte Gipsgärten ergeben. Die dafür nötigen Bedingungen sind weitgehend kompatibel mit den geochemischen Verhältnissen auf dem frühen ...
Selina Reigl   +5 more
wiley   +1 more source

Caracterización litoestratigráfica de los afloramientos miocenos del entorno de Pozo Moro-Pétrola (Albacete) y su explotación como recurso constructivo local

open access: yesGeogaceta
En el área entre Pétrola y Pozo Moro (centro-oeste de la provincia de Albacete) afloran depósitos miocenos formados por sucesiones de calcarenitas y areniscas que pueden alcanzar potencias superiores a los 11 metros.
Javier Martínez Martinez   +4 more
doaj   +1 more source

Laboratory studies on the consolidation and protection of calcareous materials in the Cathedral of Oviedo. Part II

open access: yesMateriales de Construccion, 1987
We have carried out a series of accelerated artificial ageing tests to study the evolution of the silico-organic treatment products applied to calcareous materials of the Catedral of Oviedo.
Rosa M. Esbert   +2 more
doaj   +1 more source

Rupture and Relamination of Continental Lithosphere in a Subduction System (Variscan Orogeny, SW Iberia)

open access: yesTectonics, Volume 44, Issue 7, July 2025.
Abstract Relamination is closely connected to subduction zones. Despite the numerous high‐P metamorphic belts recognized on Earth, relamination remains a poorly documented process. We present a continental subduction zone where the exhuming high‐P rocks became a relaminant under the upper plate.
Rubén Díez Fernández   +7 more
wiley   +1 more source

La alveolización y otras formas de alteración desarrolladas sobre las areniscas del palacio de Revillagigedo de Gijón (Asturias)

open access: yesMateriales de Construccion, 1985
The various forms of alteration presented in the monumental sandstones of the “Palacio de Revillagigedo” (Gijón, Spain) are identified, localized and studied.
Luis Valdeón   +2 more
doaj   +1 more source

Anatomy of the maxillary canal of Riograndia guaibensis (Cynodontia, Probainognathia)—A prozostrodont from the Late Triassic of southern Brazil

open access: yesThe Anatomical Record, Volume 308, Issue 3, Page 827-843, March 2025.
Abstract Investigating the evolutionary trajectory of synapsid sensory and cephalic systems is pivotal for understanding the emergence and diversification of mammals. Recent studies using CT‐scanning to analyze the rostral foramina and maxillary canals morphology in fossilized specimens of probainognathian cynodonts have contributed to clarifying the ...
Pedro Henrique Morais Fonseca   +7 more
wiley   +1 more source

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