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Mostrando ítems 1-10 de 74
Artículo
Experimental study on the use of granulometric speciation for the radiometric dating of recent sediments
(Elsevier, 2019)
Theoretical and experimental studies have shown that activity concentrations of fallout radionuclides (such as 137Cs and excess 210Pb) decrease with particles size in aqueous suspensions. This paper is aimed at reviewing ...
Artículo
Could bulk density profiles provide information about recent sedimentation rates?
(Springer, 2011)
Independent validation has to be an integral part of the 210Pb-based radiometric dating of recent sediments. The combined use of artificial fallout radionuclides leads to serious problems because only the identification ...
Artículo
A modeling study of Ra-226 dispersion in an estuarine system in south-west Spain
(Elsevier, 1994)
A numerical model to study 226Ra dispersion in the Odiel River, in which two fertilizer plants release their wastes, has been developed. The hydrodynamic equations have been solved to obtain the instantaneous water state ...
Artículo
The Zanclean megaflood of the Mediterranean – Searching for independent evidence
(Elsevier, 2020)
About six million years ago, the Mediterranean Sea underwent a period of isolation from the ocean and widespread salt deposition known as the Messinian Salinity Crisis (MSC), allegedly leading to a kilometer-scale level ...
Artículo
Estudio arqueoastronómico de las iglesias de la Asunción en los poblamientos cristianos tras la reconquista de las provincias de Córdoba y Soria
(Real Academia de Córdoba, 2020)
Estudiamos la orientación de las iglesias de la Asunción en Soria (N=73). El grupo del románico de repoblación (N=45, siglos XII-XIII) muestra patrones de orientación solar: 47% de las iglesias se alinean con el sol ...
Artículo
A numerical modeling study on oceanographic conditions in the former Gulf of Tartessos (SW Iberia): Tides and tsunami propagation
(Elsevier, 2014)
At least five catastrophic tsunami events have affected the Iberian Atlantic coasts during the last 7000 years. During this time, the former Gulf of Tartessos evolved towards the present marshland area, in the lower ...
Artículo
Modelling the dispersion of non-conservative radionuclides in tidal waters .2. Application to Ra-226 dispersion in an estuarine system
(Elsevier, 1996)
The Odiel river is an estuary system located in the south-west of Spain and affected by tidal dynamics. A phosphate fertilizer processing plant releases part of its wastes directly into the Odiel river. The model described ...
Artículo
Fallout 210Pb as a soil and sediment tracer in catchment sediment budget investigations: A review
(Elsevier, 2014)
Increasing anthropogenic pressures coupled with climate change impacts on natural resources have promoted a quest for innovative tracing techniques for understanding soil redistribution processes and assessing the environmental ...
Artículo
Impact of gold-mining activity on trace elements enrichment in the West African estuaries: The case of Pra and Ankobra rivers with the Volta estuary (Ghana) as the reference
(Elsevier, 2018)
This study aimed at assessing trace element concentrations in two representative estuaries of Ghana (Pra and Ankobra) affected by gold-mining, relative to the levels of the unaffected Volta estuary. Surficial sediments ...
Artículo
An exploratory modelling study on sediment transport during the Zanclean flood of the Mediterranean
(Springer, 2019)
A nearly 400-km-long erosion channel through the Strait of Gibraltar has been interpreted as evidence for a catastrophic refll of the Mediterranean at the end of the Messinian salinity crisis, 5.33 million years ago. ...