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Browsing Geogaceta -- Nº 29, (2000) by Issue Date
Now showing items 1-20 of 41
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El Neógeno superior del Valle del Souss (Agadir, Sur de Marruecos)
(Sociedad Geológica de España, 2000)The present contribution shows the first approach to the sedimentological and palaeontological characteristics of two representative Upper Neogene sections of the Souss Valley (Agadir, S. of Morocco): Tildi and Ait Aouth, ... -
El límite Ypresiense / Luteciense en la Región de Murcia (Cordillera Bética,España)
(Sociedad Geológica de España, 2000)Séveral sections has been studied across the Murcia Region in arder to select a suitable section in Spain that could be a good candidate to define the Ypresian/Lutetian boundary stratotype. The sections of Casa Carreño, ... -
Sedimentación pelágica jurásica sobre rocas volcánicas submarinas en Algarinejo (Provincia de Granada, Zona Subbética)
(Sociedad Geológica de España, 2000)In the Median Subbetic (Algarinejo locality) submarine volcanic flows interbedded in pelagic Middle Jurassic sedimentary rocks have been previously described. Levels of caldsiltites with wave lamination and hummocky ... -
Foraminíferos bentónicos actuales de la plataforma continental del norte del Golfo de Cádiz
González-Regalado Montero, María Luz
; Ruiz Fernández, Federico; Tosquella Angrill, Josep; Baceta, Juan Ignacio; Pendón Martín, José Gabriel; Abad de los Santos, Manuel; Hernández Molina, F. Javier; Somoza, L.; Díaz del Río, Víctor (Sociedad Geológica de España, 2000)
The Benthic foraminifera of the superficial sediments of several cores from the continental shelf of the north Cádiz Cu If have been analized. The distribution of these organisms shows a clear dependency to the water depth, ... -
Las pizarras negras del "Sinclinal de Las Herrerías", Faja Pirítica Ibérica
González Barrionuevo, Felipe; Moreno Garrido, María Carmen; Rodríguez, R. M.; Sáez Ramos, Reinaldo (Sociedad Geológica de España, 2000)
Black Shale Level of Las Herrerías Sindine is Tournaisian-Upper Visean (close to basal Namurian) in age and, it is stratigraphically equivalent to the Vulcano Sedimentary Complex in other places of the Iberian Pyrite Belt. ... -
Sedimentación en plataforma somera durante el Neoproterozoico. Formación Boque-Serpins (Grupo de las Beiras) en Trevim (Sierra de Lousá, Portugal Central)
(Sociedad Geológica de España, 2000)The metasediments of the Schist-Greywacke Complex (Durico-Beirao Supergroup) of late Neoproterozoic to lower Cambrian age are at present divided in Portugal into Beiras, Douro and Arda-Marofa Groups. In the Sierra de Lousa ... -
Discontinuidad sedimentaria del Ordovícico terminal en los Pirineos centrales
(Sociedad Geológica de España, 2000)The Upper Ordovician stratigraphic sequence from the Pyrenean Axial Zone starts at a basal conglomerate, known as the Rabassa Fm in the Central and Eastern Pyrenees, that overlays unconformably an undated silicidastic ... -
Deformaciones recientes en el frente de la Cordillera Rifeña (Prerif, Marruecos)
(Sociedad Geológica de España, 2000)The Prerif ridges form pari of the foreland of the Rif Mountains. They are formed by superposed slices, with folds and faults, originated during the late Miocene WSWwards displacement of the Prerif units. At present, they ... -
Low-K Tholeiitic Signatures in Calayan Island (Northern Luzon, Philippines)
(Sociedad Geológica de España, 2000)The Calayan island is a Tertiary (7-4 Ma) volcanic island situated in the northern portion of the Philippine archipelago, a part of Babuyan segment of the Luzon arc. It is a product of subduction of South China Sea oceanic ... -
Evolución hidrogeoquímica en las salinas de Cerrillos (Almería) y la relación entre aguas subterráneas y salmueras
(Sociedad Geológica de España, 2000)The saltworks of Cerrillos are located in the sea coast. The origin of these waters is essentially marine, but the influence of the groundwater discharge could be significant. The chemical diversity of the water increases ... -
Sinistrai transcurrent transpression at the Ossa-Morena Zone / Central-lberian Zone boundary: the Portalegre-Esperanga shear zone (Portugal)
(Sociedad Geológica de España, 2000)En el borde sur del Macizo Ibérico, al NE del Alentejo (Portugal) se ha reconocido la zona de cizalla varíscica de Portalegre-Esperanga (PESZ). Esta zona incluye rocas del basamento de Ossa Morena del Proterozoico superior ... -
Datos preliminares sobre los ostrácodos de las arenas basales de la Formación "Niebla" (Depresión del Guadalquivir, S.O. de España)
Ruiz Muñoz, Francisco; González-Regalado Montero, María Luz; Baceta, Juan Ignacio; Pendón Martín, José Gabriel; Tosquella Angrill, Josep (Sociedad Geológica de España, 2000)
This work analyses the ostracofaune of the basal sands of the "Niebla“ Formation (Baceta and Pendón, 1 999). The associations permit to infer the beginning of a transgressive sequence, with a very shallow, vegetated, ... -
Cuantificación de los recursos hídricos en la vertiente meridional del Parque Natural de Sierra Almijara (Málaga). Consideraciones sobre su régimen de explotación
(Sociedad Geológica de España, 2000)The southern slope of the Sierra Almijara (Málaga province) is an area of great ecological value which has recently been protected as a Natural Park. Its predominant lithology is of carbonate materials (marbles belonging ... -
Reinterpretación paleoambiental de la Formación Rio Bonito (Pérmico de la Cuenca de Paraná) en el yacimiento de carbón de Iruí, Rio Grande do Sul, Brasil: Integración de análisis de facies, ¡enología y estratigrafía secuencial de alta resolución
(Sociedad Geológica de España, 2000)The Permian Rio Bonito Formation of the Parana Basin, southern Brazil, has been traditionally interpreted in terms of a fluvio-dominated deltaic model. Integration of facies analysis, ichnology, and high-resolution sequence ... -
Génesis y caracterización del cordón estuarino de Las Nuevas (P. N. de Doñana)
Cáceres Puro, Luis Miguel; Rodríguez Ramírez, Antonio; Ruiz Fernández, Federico; González-Regalado Montero, María Luz; Muñiz Guinea, Fernando; Rodríguez Vidal, Joaquín; Abad de los Santos, Manuel; Carretero, María Isabel (Sociedad Geológica de España, 2000)
The georñorphological and palaeontological studies of the Las Nuevas estuaríne ridge indicates that these silty sands with abundant macrofaune were deposited over clayey marsh deposits during some erosive events at ... -
Liesegang rings in pelagic limestones: genetic considerations
(Sociedad Geológica de España, 2000)Liesegang rings have been recognized in Middle Jurassic pelagic marly limestones of the Subbetic, Southern Spain. The rings of these structures consist of iron hydroxide concentrations and/or small textural changes and are ... -
Análisis de las características geométricas y desarrollo temporal de un sistema de díaclasas en las rocas triásicas del límite Cordillera Ibérica - Sistema Central
(Sociedad Geológica de España, 2000)The mesozoic and tertiary rocks at the Iberian Range-Spanish Central System boundary in Guadalajara (Spain) depict a very important development of systematic joint sets. This study is focused on a detailed and systematic ... -
Thermal evolution of the Miers Bluff Formation from apatite fission track (Livingston Island, Antarctic Peninsula region)
(Sociedad Geológica de España, 2000)El análisis de las trazas de fisión en apatitos procedentes de los metasedimentos de bajo grado metamòrfico de la Formación Miers Bluff (Península Hurd, Isla Livingston, Islas Shetland del Sur) muestra que el enfriamiento ... -
Reconocimiento geoeléctrico de paleovalles en la depresión terciaria de Ciudad Rodrigo
(Sociedad Geológica de España, 2000)The V.E.S. (vertical electrical sounding) study undertaken in the Ciudad Rodrigo Craben unravels the structure and the lithology of the graben infill. The basement resistivity values (200-350 Qm) indicate the presence of ... -
Descubrimiento de una pista semiplantígrada de dinosaurio en el yacimiento de Tirika (Demnat. Alto Atlas central marroquí)
(Sociedad Geológica de España, 2000)There are not known too much dinosaur trackways with the metatarsus imprints. The existent dates mention abouth 30 trackways. This is the first time, one or this kind of trackway is described in Morocco. The shape of this ...
