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Browsing by Author "Sierro, Francisco Javier"
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Análisis de un nuevo registro micropaleontológico en el margen meridional del archipiélago de las Svalbard (océano Ártico): resultados preliminares e implicaciones paleoceanográficas
(2009)Preliminary results of micropalaeontological analyses carried on samples from a sediment core recovered in summer 2007 in the Storfjorden area (SW Svalbard margin, Arctic Ocean) reveal changes in the concentrations of ... -
Astronomical cyclicity and sapropels in the pre-evaporitic Messinian of the Sorbas basin (Western Mediterranean)
(Sociedad Geológica de España, 1996)A high resolution study of the Messinian pre-evaporitic maris of the Sorbas basin was carried out with the main object of analysing the high frequency cyclicity identified in this basin, in the lower part of the succession, ... -
Cambios en la dinámica litoral y nivel del mar durante el Holoceno en el Sur de Iberia y Canarias Orientales
Zazo, C.; Dabrio, Cristino José; Goy, José L.; Bardají, Teresa; Ghaleb, B.; Lario, J.; Hoyos, M.; Hillaire Marcel, Cl.; Sierro, Francisco Javier; Flores, José Abel; Silva, P. G.; Borja Barrera, Francisco
(Sociedad Geológica de España, 1996)
The interaction between global factors C'global" glacio-eustatic sea-level rise) and regional factors (tectonic trend, oceanographic factor) is analyzed in different areas of the Iberian and Canary Island littoral. Sea-level ... -
Caracterización e interpretación de las capas ricas en detríticos en sedimentos del Site U1314 (Atlántico Norte) durante los estadios isotópicos marinos 21-19 (~ 830-779 ka)
(Universidad de Huelva, 2011)Muestras del IODP Site U1314, recuperadas en la formación Gardar Drift (Atlántico Norte subpolar), fueron estudiadas para determinar que procesos controlan la sedimentación terrígena desde los continentes en este área ... -
Caracterización geoquímica de las capas ricas en materia orgánica registradas durante el estadio isotópico marino 7 en el Mar de Alborán (Mediterráneo occidental)
(2007)Samples from the Alboran Sea (Western Mediterranean) were studied in order to characterise the organic rich layers recorded during marine isotope stage 7 from a geochemical point of view. X ray fluorescence measurements ... -
Climatic and oceanographic changes for the last 25 cal ky bp in the Alboran Sea. A diatom inference
(Sociedad Geológica de España, 1999)The present work concerns the study of the Calypso piston core MD 95-2043 (36°09'N/2°37.269 'W). In order to establish a stratigraphic time framework the age model is based on seventeen uC-dates, AMS radiocarbon ages ... -
Comparison between different methods of paleotemperature reconstruction in the Alboran Sea (OPD 977 core), based on planktic foraminifera assemblages of the last 150 kyr
(Sociedad Geológica de España, 2003)Sea surface temperatures (SST) in the Alboran Sea during the last 150 ka have been reconstructed in ODP Site 977 using the Transfer Function method of Imbrie & Kipp (1971) and the Modem Analog Technique (MAT), both based ... -
Control orbital de la dinámica de la surgencia de Perú durante los últimos 800 ka evidenciado por las asociaciones de Cocolitofóridos
(Sociedad Geológica de España, 2005)In order to analyze the surface water dynamics in the Peru upwelling system zone during the last 800 Ka, we studied the calcareous nannofossil content. The ODP site 1237 coccolith assemblage revealed two dominant taxa: ... -
Dinámica superficial en la Ría de Vigo durante los últimos 3000 años puesta de manifiesto a través de los cocolitofóridos y biomarcadores
(Sociedad Geológica de España, 2002)We identified three coccolithophores assemblages in core VIR-18, in the Ría de Vigo. We will use these assemblages together with other biogeochemical data to make paleoenvironmental interpretations about this area and thus ... -
Distribución espacial del cocolitofórido Emiliania huxleyi en el sector Pacífico del océano Antártico: nuevos datos para la reconstrucción paleoambiental y caracterización de eventos bioestratigráficos
(Sociedad Geológica de España, 2005)A specific biometric study of coccoliths of Emiliania huxleyi has been accomplished on 25 surface water samples from the eastern Pacific sector of the Southern Ocean. In all samples, E. huxleyi is the most abundant taxon, ... -
Estudio de paleotemperaturas en el Mar de Alborán entre 250 y 150 ka utilizando la técnica de los análogos modernos
(2006)Planktonic foraminifers from core ODP site 977a have been studied to estimate sea surface temperatures (SST) in the Alboran Sea between 245 and 145 kyr. Similar studies have been performed in this basin but only for the ... -
Evolución térmica de distintas masas de agua a lo largo del estadio isotópico marino 7 basada en el Mg/Ca de la concha de los foraminíferos planctónicos
(2008)Mg/Ca measurements have been performed on tests from the planktonic foraminifers Globigerinoides ruber (white) and Globigerina bulloides in samples from ODP site 977A in the Alboran Sea (Western Mediterranean) in order ... -
Factores que controlan la calcificación de la concha en Neogloboquadrina pachyderma (dextrorsa)
(2008)Samples from core ODP site 977, retrieved in the Alboran Sea (Western Mediterranean Sea), have been studied in order to better constrain the factors controlling the calcification rate in the planktonic foraminifer Neog ... -
Influencia de El Niño de 1997-98 en las comunidades planctónicas del Mar de Alboran (Mediterraneo Occidental)
(Sociedad Geológica de España, 2005)The Alboran Sea is the westernmost basin of the Mediterranean Sea. Its particular location, as entrance of the Atlantic Surface Water (ASW) into the Mediterranean, has led to an intense paleoceanographic and paleoclimatic ... -
Marine sediments: an accurate tool for reconstructing climatic variability in equatorial Africa during the Late Pleistocene
(Sociedad Geológica de España, 1996)El análisis micropaleontológico de los últimos 140 000 años registrados en testigo de gravedad CAMEL-1 (5-6'25S/21-2'36W), sugirió valores bajos en la paleoproductividad de las aguas superficiales circundantes. Por otro ... -
Moluscos, Ostrácodos y Palinología de las facies fluvio-lacustres del Neógeno del SE de la provincia de Valladolid (Cuenca del Duero)
(Sociedad Geológica de España, 1989)The Mollusca, Ostracoda, Foraminifera and Palino/gy from 14 localities in the Eastern Neogene of Valladolid (Duero Basin) are studied. Differents stratigraphic levels are included in the Facies «Dueñas», «Zaratán», «Cuestas» ... -
Nuevas aportaciones a la biogeografía de cocolitóforos en el Pacífico ecuatorial y suroriental
(2007)For this proposal 114 surface sediment samples from the Equatorial and Southwestern Pacific were analysed, recovered during three cruises: Génesis III-RR9702A, NEMO-Me0005A and PUCK: Valparaiso-Talcahuano. A total of 19 ... -
Plancton y bentos calcáreos del Neógeno superior en sondeos oceánicos (D.S,D.P.) del Atlántico NE y sistema Bético-rifeño
(Sociedad Geológica de España, 1989)In this report we summarize the main results obtained on the calcareous plankton and benthos of the North Atlantic and Betic-riffean system. A scheme showing the most important changes in the planktonic foraminiferal and ... -
Reconstrucción de la posición del frente ártico a partir de las asociaciones de foraminíferos planctónicos durante los estadios isotópicos marinos 14, 15 y 16
(2008)Planktic foraminifer assemblages and lithic components from IODP core U1314 (northern North Atlantic) were studied with high resolution from marine isotope stage (MIS) 14 to 16 (~ 530-700 ka). This study aims to contribute ... -
Reconstrucción de las temperaturas superficiales marinas delmargen ibérico sudoriental durante el último periodo glacial mediante el empleo de cocolitofóridos
(Sociedad Geológica de España, 2005)Detailed quantitative analyses of coccolithophore assemblages have been carried out in three sediment cores recovered from different locations in the Atlantic and Mediterranean sectors of the Iberian Peninsula. Biostra ...
