Dinàmica de la Terra i de l'Oceà: Enviaments recents
Ara mostrant els elements 181-200 de 1037
Lake-level and salinity reconstruction from diatom analyses in Quillagua Formation (Late Neogene, Central Andean Forearc, Northern Chile)
A sedimentary and micropaleontological study of the Quillagua Formation provides a detailed paleohydrological reconstruction of the lacustrine system which occupied the present-day hyperarid Quillagua-Llamara fore-arc Basin ...
Ocean Literacy Opportunities in Urban Marine Ecosystems: Gorgonian Populations in Barcelona (Catalonia, Spain)
Urban marine ecology, an emerging field in marine research, presents new opportunities to promote ocean literacy and contribute to the UN Decade of Ocean Science for Sustainable Development (2021–2030). Seeking to advance ...
Four-topic correlation between flood dendrogeomorphological evidence and hydraulic parameters (the Portainé stream, Iberian Peninsula)
Torrential floods are hazardous hydrological phenomena that produce significant economic damage worldwide. Flood reconstruction is still problematic in ungauged mountainous areas due to the lack of systematic data, so ...
The measurement of ice velocity, mass balance and thinning-rate on Johnsons Glacier, Livingston Island, South Shetland Islands, Antarctica
A network of twenty stakes was set up on Johnsons Glacier in order to determine its dynamics. During the austral summers from 1994-95 to 1997-98, we estimated surface velocities, mass balances and ice thickness variations. ...
Soil properties explain tree growth and mortality, but not biomass, across phosphorus-depleted tropical forests
We observed strong positive relationships between soil properties and forest dynamics of growth and mortality across twelve primary lowland tropical forests in a phosphorus-poor region of the Guiana Shield. Average tree ...
A layer stripping approach for monitoring resistivity variations using surface magnetotelluric responses
The resolution of surface-acquired magnetotelluric data is typically not sufficiently high enough in monitoring surveys to detect and quantify small resistivity variations produced within an anomalous structure at a given ...
Susceptibility to flooding for torrential flows using the integration of the geomorphological method and the modelling with FLO-2D, lake Atitlan, Guatemala
Lake Atitlan (Guatemala) is located in the transit region of the tropical cyclones formed in both the Atlantic Ocean and the Pacific Ocean. Every year, these phenomena cause abundant and intensive rain fall which in turn ...
Magnetoestratigrafía de las sucesiones pliocénicas del Baix Llobregat: aproximación preliminar
El análisis estratigráfico de las sucesiones sedimentarias de la antigua bahía pliocénica del Baix Llobregat indica que su registro sedimentan~ a florante se depositó dentro de un único pulso trangresivo. El análisis ...
First occurrence of family Clavatoraceae (fossil Charophyta) in the Middle Jurassic (Bathonian) of France
A rich and diverse charophyte flora is described from the Bathonian marginal marine beds of southern France.It includes nine species that belong to the families Porocharaceae, Characeae and Clavatoraceae: Porochara gr. ...
Dating the northern deposits of the Ebro foreland basin; implications for the kinematics of the SW Pyrenean front
Dating the sedimentary infill of the northern margin of the Ebro foreland basin informs about the orogen-basin evolution. A magnetostratigraphic section of ~5 km-thick combines new magnetostratigraphic results from the ...
Holocene neoglacial events in the Bransfield Strait (Antarctica). Paleogeographic and paleoclimatic significance
The morphological characterisation of the western submarine island flanks of El Hierro and La Palma differentiates four type-zones that may give new insights into the evolution of oceanic island slopes. The different ...
A Neanderthal’s specialised burning structure compatible with tar obtention
Here we present multiproxy evidence of a new type of Neanderthal hearth discovered in Vanguard Cave (VC)(Gibraltar), which is dated ∼ 65 kyr, and associated with Middle Paleolithic stone artefacts. The hearth structure ...
Sobre las formaciones Àger i Bagà, del Eoceno del Cadí (Prepirineo oriental) y de unos pretendidos olistolitos del mismo,
Se define, en el Eoceno del Prepirineo oriental, entre los ríos Segre y Freser, la Formación Baga y dos miembros de la Formación Ager: calizas con Alveolinas y margas del Clot del Moro. Además, se discute el origen y ...
The North Maladeta fault (Spanish Central Pyrenees) as the Vielha 1923 earthquake seismic source: recent activity revealed by geomorphological and geophysical research.
The Spanish Central Pyrenees have been the scenario of at least two damaging earthquakes in the last 800 years. Analysis of macroseismic data of the most recent one, the Vielha earthquake (19 November 1923), has led to the ...
Carbon dynamics within cyclonic eddies: insights from a biomarker study
It is generally assumed that episodic nutrient pulses by cyclonic eddies into surface waters support a significant fraction of the primary production in subtropical low-nutrient environments in the northern hemisphere. ...
Mesozoic geology of Cape Shirreff, Livingston Island, South Shetland Islands, Antarctica.
Al Cap de Shirr e ff (Fig. 1) hi aflora una successió volcànica de com a mínim 450 m de potència, constituïda principalment per laves i, en menor proporció, bretxes vulcanoclàstiques (Fig. 2). Les laves són basalts olivínics ...
El hidrolacolito de las Calderuelas (Parque Nacional de la Sierra de Guadarrama), una morfología periglaciar singular
This research describes the finding of a hydro-laccolith in the Sierra de Guadarrama (Central System). The study, based on the combination of Digital Terrain Models (DTM) and geoelectrical data, allowed the characterization ...
Bioestratigrafia y litoestratigrafia del Paleogeno del area de Sierra EspuÑa (Cordillera Betica oriental, SE de EspaÑa)
Se presentan nuevos datos litoestratigráñcos y hioestratigráficos del Paleógeno de Sierra Espuña (zona limítrofe entre la zona interna y la externa de la cordillera Bética). Los datos bioestratigráficos se han basado en ...
Cómo usar ventiladores para extraer miles de toneladas de CO₂ de la atmósfera
Las tecnologías de captura directa del aire atrapan el dióxido de carbono mediante filtros, membranas o sustancias líquidas. Este tipo de soluciones son necesarias para alcanzar los objetivos de reducción de emisiones.
A reappraisal of 'International Stratigraphic Lexicon' and the need for the creation named units critical catalogues
Analysis of stratigraphic terminology and classification, shows that time-related stratigraphic units, which by definition have a global extent, are the concern of international cornrnissions and committees of the intemational ...
