Results 51 to 60 of about 259 (114)

Análisis e interpretación de los materiales volcánicos del Cerro de los Frailes (Cabo de Gata. Almería)

Estudios Geologicos, 1987
La formación del volcán de Los Frailes se produjo en dos ciclos, de composiciones andesítica anfibólica (Frailes-I) y andesitica de dos piroxenos (Frailes-II), apoyadas sobre la prolongación hacia el este de las andesitas y dacitas del extremo sur de ...
J. M. Fernández Soler
doaj   +1 more source

Tidal versus fluvial point bars: Key features from the integration of outcrop, core and wireline log information of Triassic examples

The Depositional Record, Volume 10, Issue 5, Page 793-820, November 2024.
Abstract The Triassic red beds of the Tabular Cover of the Iberian Meseta are an excellent reservoir outcrop analogue, a direct consequence of high‐quality exposures, which offer exceptional three‐dimensional outcrops, as well as a wide variability of depositional environments.
Luis Miguel Yeste, Marc Gil‐Ortiz, Fernando García‐García, César Viseras, Neil David Mcdougall, Patricia Cabello, Luca Caracciolo   +6 more
wiley   +1 more source

Efectos de las fallas asociadas a sobreexplotación de acuíferos y la presencia de fallas potencialmente sísmicas en Morelia, Michoacán, México

Revista Mexicana de Ciencias Geológicas, 2018
En las últimas dos décadas muchas zonas urbanas en el centro de México han sido afectadas por hundimientos diferenciales del suelo. Generalmente estos procesos se han ligado solamente a la sobreexplotación de acuíferos.
Víctor Hugo Garduño-Monroy, Eleazar Arreygue-Rocha, Isabel Israde-Alcántara, Gerardo M. Rodríguez-Torres   +3 more
doaj  

Patterns of Plio‐Pleistocene Ice Volume Variability Recorded by the Large‐Magnitude Explosive Eruptions From the Kamchatka‐Kurile Volcanic Arc

Geochemistry, Geophysics, Geosystems, Volume 25, Issue 10, October 2024.
Abstract Marine fallout ash beds can provide continuous, time‐precise records of highly explosive arc volcanism that can be linked with the climate record. An evaluation of revised Plio‐Pleistocene (0–4 Myr) tephrostratigraphies from Ocean Drilling Program Sites 881, 882, and 884 confirms cyclicity of the Kamchatka‐Kurile arc volcanism and a marked ...
Susanne M. Straub, Brendan Reilly, Maureen E. Raymo, Arturo Gómez‐Tuena, Kuo‐Lung Wang, Elisabeth Widom, David Kuentz, Richard J. Arculus   +7 more
wiley   +1 more source

Mineralogía de series cretácicas de la zona subbética. Algunas consideraciones paleogeográficas derivadas de la composición química de las esmectitas

Estudios Geologicos, 1986
En este trabajo se estudia la mineralogía de diversas secuencias subbéticas muy ricas en esmectitas y de edad Aptense-Coniacense, haciendo especial hicapié en la composición química de tales componentes.
A. López Galindo
doaj   +1 more source

STRATIGRAPHY AND DIAGENESIS OF THE THAMAMA‐B RESERVOIR ZONE AND ITS SURROUNDING DENSE ZONES IN ABU DHABI OILFIELDS AND EQUIVALENT OMAN OUTCROPS

Journal of Petroleum Geology, Volume 47, Issue 4, Page 395-430, October 2024.
We review published studies characterizing the Thamama‐B reservoir zone in the upper Kharaib Formation (late Barremian) in Abu Dhabi oilfields and at outcrops in Oman. Available data for oxygen and carbon isotope compositions, fluid inclusion measurements, cement abundance and formation water composition are interpreted in terms of a paragenetic model ...
S. N. Ehrenberg, J. E. Neilson, E. Gomez‐Rivas, N. H. Oxtoby, I.S.A.J. Jayachandran, Q. Adlan, V. C. Vahrenkamp   +6 more
wiley   +1 more source

Estudo da ocorrência da fluorita e da galena em Adrianópolis e Cerro Azul

Geografia (Londrina), 2011
Este estudo caracterizou uma tentativa, de incentivo à pesquisa junto ao Curso de Bacharelado em Geografia que acabou contribuindo para que pudessem os alunos terem uma visão da atuação do profissional (Geógrafo) no campo, para o enriquecimento do ...
Nilza A. Freres Stipp
doaj   +1 more source

Soil development and ancient Maya land use in the tropical karst landscape: Case of Busiljá, Chiapas, México

Soil Science Society of America Journal, Volume 88, Issue 5, Page 1561-1582, September/October 2024.
Abstract The soil mantle of the tropical karstic landscapes of Southern Mexico was shaped by specific processes of pedogenesis and long‐term human impacts of ancient Maya agriculture. To understand the interaction between natural and human‐induced soil‐forming processes in the calcareous mountains of Chiapas state, we studied soil toposequences around ...
P. García‐Ramírez, K. Guillén, S. Sedov, C. Golden, S. Morell‐Hart, A. Scherer, T. Pi, E. Solleiro‐Rebolledo, H. Dine, Y. Rivera   +9 more
wiley   +1 more source

Carboniferous Barrovian to Permian Buchan‐type metamorphic cycles in the Mongolian Altai Zone: Implication for pressure cycles in accretionary orogens

Journal of Metamorphic Geology, Volume 42, Issue 7, Page 979-1033, September 2024.
Abstract In the Altai Accretionary Wedge, several periods of Barrovian‐ and Buchan‐type metamorphic cycles were dated from Ordovician to Permian. However, the timing and link between these cycles are not clear, and their causes are debated. In order to contribute to the understanding of Barrovian‐ to Buchan‐type evolution of the accretionary wedges, we
Carmen Aguilar, Pavla Štípská, Karel Schulmann, Andrew R. C. Kylander‐Clark, Ondrej Lexa, Turbold Sukhbaatar, Vít Peřestý, Yingde Jiang, Pavel Hanžl   +8 more
wiley   +1 more source

Mineralogía y génesis de las arcillas de la Unidad de Almarchal (series flysch del Campo de Gibraltar. S de España)

Estudios Geologicos, 1990
El estudio de la fracción fina de la Unidad de Almarchal (series flysch del Campo de Gibraltar) ha permitido poner de manifiesto varias asociaciones mineralógicas relacionadas estrechamente con los tipos litológicos presentes: 1.
M. D. Ruiz Cruz, P. Rodríguez Jiménez, F. Carrasco   +2 more
doaj   +1 more source