Results 1 to 10 of about 17,020 (98)

Las primeras ilustraciones de fósiles españoles: nuevas observaciones acerca de las glosopetras de Armstrong (1752) y de Torrubia (1754)

open access: yesGeogaceta, 2022
Se ilustran y analizan las glosopetras figuradas en The History of the Island of Minorca, de John Armstrong (1752) y en el Aparato para la Historia Natural Española, de José Torrubia (1754), obras pioneras en la ilustración paleontológica española ...
Enrique Bernárdez, Isabel Rábano
doaj   +1 more source

Análisis espacio temporal del Índice de Vegetación de Diferencia Normalizado (NDVI) en el ecosistema bosque semideciduo piemontano del Catamayo Alamor

open access: yesCedamaz, 2023
En las últimas dos décadas, el ecosistema bosque semideciduo piemontano del Catamayo Alamor de la provincia de Loja, ha experimentado diversas amenazas antropogénicas.
Raul García   +2 more
doaj   +1 more source

Los Procesos de importación y su influencia en los costos de importación en empresas importadoras de máquinas agropecuarias al sur del Perú-2023

open access: yesSemestre Economico, 2023
El estudio indaga el cómo se relacionan los procesos con los costos de importación en empresas importadoras de maquinarias agropecuarias al sur del Perú, porque para una empresa dedicada a las importaciones es vital que se tenga un conocimiento profundo
Michael Jhordan Chambi Vilca   +2 more
doaj   +1 more source

The Messinian stromatolites of the Sierra del Colmenar (Western Mediterranean): facies characterization and sedimentological interpretation [PDF]

open access: yesPeerJ, 2018
A representative outcrop of the Messinian stromatolites belonging to the Terminal Carbonate Complex unit, from the northern sector of the Bajo Segura basin (Caja de Ahorros del Mediterraneo section, Sierra del Colmenar, SE Spain) has been studied.
Patricio Guillermo Villafañe   +4 more
doaj   +2 more sources

La faja cataclástica del borde oriental del Sistema de FamatIna, ArgentIna

open access: yesEstudios Geologicos, 1992
En las Sierras Pampeanas Noroccidentales del noroeste argentino se desarrolla una faja cataclástica de rumbo submeridional, en rocas del basamento ígneo-metamórfico pertenecientes al Paleozoico Inferior.
J. P. López, H. Lisiak, D. A. Indri
doaj   +1 more source

Faja de Deformación La Horqueta, sierra de Velasco, Sierras Pampeanas, NO de Argentina: petrografía, geoquímica, estructuras y significado tectónico

open access: yesEstudios Geologicos, 2007
La Faja de Deformación La Horqueta (FDLH) es la sexta faja de cizalla reconocida en la sierra de Velasco, Sierras Pampeanas, NO de Argentina. Esta faja separa dos tipos de metagranitoides de características petrográficas y geoquímicas contrastadas ...
J. P. López, P. Grosse, A. J. Toselli
doaj   +1 more source

La Formación Puncoviscana y unidades estratigráficas vinculadas en el Neoproterozoico - Cámbrico Temprano del Noroeste Argentino

open access: yesLatin American Journal of Sedimentology and Basin Analysis, 2021
El lapso Neoproterozoico/Cámbrico temprano en la región noroeste de Argentina se encuentra representado por una potente secuencia sedimentaria que se destaca por su escaso metamorfismo y gran tectonización. Bajo la denominación de Formación Puncoviscana
Florencio Aceñolaza   +1 more
doaj   +2 more sources

Petrología y geoquímica de los granitoides peralumínicos de la Faja TIPA, en el borde occidental de Gondwana, sistema de Famatina, Argentina

open access: yesEstudios Geologicos, 1996
En este trabajo se presentan las principales características petrográficas y geoquímicas de las rocas que constituyen las Sierra de Copacabana, flanco oriental de la Sierra de Paimán y extremo NW de la Sierra de Velasco, dentro de la importante ...
J. P. López, A. J. Toselli
doaj   +1 more source

Petrología y análisis geométrico y tectónico de las milonitas de la Sierra de Copacabaña, provincia de Catamarca, República Argentina

open access: yesEstudios Geologicos, 1992
Se realiza un estudio petrológico estructural de las unidades que componen el extremo septentrional de la Sierra de Copacabana, que se localiza en el ámbito de las Sierras Pampeanas Noroccidentales.
J. P. López
doaj   +1 more source

Petrología, Geoquímica y Geología estructural de la Sierra de Copacabana (provincia de Catamarca, República Argentina) y su significado geotectónico en el contexto del margen occidental del Gondwana

open access: yesEstudios Geologicos, 1998
La Sierra de Copacabana es una unidad orográfica emplazada en el ambiente de Sierras Pampeanas Noroccidentales, al E del Sistema de Famatina. Tanto su basamento, compuesto por rocas metamórficas de grado medio formadas durante el ciclo Pampeano, como los
J. P. López
doaj   +1 more source

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