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| Registros recuperados: 28 | |
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| Mansour, A.M.; Mohamed, A.W.; El Dien, G.K.; Sayed, S.M.. |
| The studies areas lay in Hurghada region include different aspects of coastal development. It represents different environmental problems and threats to the Red Sea ecosystem and geosystem. They include two tourist projects, a central marina for yachts and fishermen and a site for oil exploration and production. All sits have implemented Environmental Impact Assessment studies (EIA). Unfortunately, dredging and landfilling caused severe coast destruction and shoreline change in these areas. All sites have accurately surveyed and environmental problems cited, oceanographic parameters were measured, and 109 samples were collected from the beach and the tidal flat of four sits forming the study area. Grain size, carbonates and organic matter contents, major... |
| Tipo: Journal Contribution |
Palavras-chave: Field Study; Environmental conditions; Sedimentology; Coastal erosion. |
| Ano: 2007 |
URL: http://hdl.handle.net/1834/1904 |
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| Achab, M.; El hatimi, I.; El moumni, B.. |
| Dans le but d’évaluer le degré de contamination chimique et/ou organique des sédiments superficiels le long des émissaires continentaux, des échantillons de sédiments de surface ont été prélevés et analysés le long des oueds Souani et Mghogha et au niveau de la canalisation majeure de la ville de Tanger débouchant sur la baie située sur la marge méditerranéenne marocaine. La dynamique sédimentaire dans les oueds montre exceptionnellement une évolution amont–aval granocroissante en relation avec l’activité anthropique (remblaiement des bassins versants par les matériaux de construction tels que les briques, ciments, verres, etc.). La matière organique est présente à des teneurs relativement élevées en corrélation positive avec la sédimentation fine. L’azote... |
| Tipo: Journal Contribution |
Palavras-chave: Sedimentology; Mineralogy; Pollution; Geochemical surveys; Bay dynamics. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/199 |
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| Rossi, G.; Baritse, L.; Blivi, A.B.. |
| La côte togolaise, basse et sableuse, soumise è une violente érosion par suite d'une série d'erreurs d'aménagements, a fait l'objet en 1987-1988 d'importants travaux destin's à protéger sur 15 km la ville d'Aného et l'usine de phosphates de Kpémé, principale industrie du pays. La préparation de ces travaux, de protection, rendus indispensables par la gravité des enjeux économiques et sociaux, a nécessité des études hydrologiques et sédimentologiques très détaillées, ainsi que la construction et l'exploitation par un bureau d'étude spécialisé de deux importants modèles physique (32 x 20 m) destinés à optimiser le dispositif de protection et à déterminer l'évolution du trait de côte sur une période de 25 ans... |
| Tipo: Other |
Palavras-chave: Coastal zone; Sedimentology; Coastal erosion; Coastal erosion; Http://aims.fao.org/aos/agrovoc/c_9949. |
| Ano: 1991 |
URL: http://hdl.handle.net/1834/1228 |
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| Soledispa, B.. |
| En este trabajo se presentan los resultados del reconocimiento geológico de la zona de playa, zona de dunas, de los acantilados, así como fotografías de las características geomorfológicas más sobresalientes de la Bahía de Jaramijó, observadas en el año 2008. Los acantilados son de mediana a baja altura, conformados por rocas sedimentarias, principalmente de la Formación Tablazo. Hay algunos sectores donde la erosión es más fuerte, producto del socavamiento que hace el oleaje en la base de los acantilados. También se presentan los resultados de las investigaciones realizadas sobre sedimentos superficiales de fondo, desde el punto de vista de la textura y de los parámetros estadísticos. Un total de 45 muestras de sedimentos del fondo marino de la zona... |
| Tipo: Journal Contribution |
Palavras-chave: Geomorphology; Sedimentology; Sedimentary rocks; Parameters; Cliffs. |
| Ano: 2012 |
URL: http://hdl.handle.net/1834/4720 |
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| Guimarães,José Tasso Felix; Cohen,Marcelo Cancela Lisboa; França,Marlon Carlos; Silva,Any Kelly Terra da; Rodrigues,Suyanne Flavia Santos. |
| Based on sedimentological and geochemical data, this work relates spectrophotometric measurements with sediment composition and its application in palaeoecological studies of Amazon wetlands. The CIELAB values are directly related to mineralogical and chemical composition, mostly involving quartz, iron oxyhydroxides and sulfides (e.g. pyrite), and total organic carbon. Total organic carbon contents between 0.4-1%, 1-2%, 3-5% and 15-40% were related to L* (lightness) data of 27, 26-15, 7-10 and 7 or less, respectively. The CIELAB values of a deposit in Marabá, Pará, were proportional to variations in quartz and total organic carbon contents, but changes in zones of similar color, mainly in the +a* (red) and +b* (yellow) values of deposits in Calçoene, Amapá... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sedimentology; Amazon region; Munsell color systems; Mineralogy; Chemical composition. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672013000300009 |
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| Rossetti,Dilce F.; Góes,Ana M.; Bezerra,Francisco H.R.; Valeriano,Márcio M.; Brito-Neves,Benjamim B.; Ochoa,Felipe L.. |
| Several publications have contributed to improve the stratigraphy of the Paraíba Basin in northeastern Brazil. However, the characterization and distribution of sedimentary units in onshore areas of this basin are still incomplete, despite their significance for reconstructing the tectono-sedimentary evolution of the South American passive margin. This work provides new information to differentiate among lithologically similar strata, otherwise entirely unrelated in time. This approach included morphological, sedimentological and stratigraphic descriptions based on surface and sub-surface data integrated with remote sensing, optically stimulated luminescence dating, U+Th/He dating of weathered goethite, and heavy mineral analysis. Based on this study, it... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Morphology; Sedimentology; Stratigraphy; Chronology; Tectonics; Paraíba Basin. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000200007 |
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| Rossetti,Dilce F.; Góes,Ana M.. |
| Marajó Island shows an abundance of paleochannels easily mapped in its eastern portion, where vegetation consists mostly of savannas. SRTM data make possible to recognize paleochannels also in western Marajó, even considering the dense forest cover. A well preserved paleodrainage network from the adjacency of the town of Breves (southwestern Marajó Island) was investigated in this work combining remote sensing and sedimentological studies. The palimpsest drainage system consists of a large meander connected to narrower tributaries. Sedimentological studies revealed mostly sharp-based, fining upward sands for the channelized features, and interbedded muds and sands for floodplain areas. The sedimentary structures and facies successions are in perfect... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Remote sensing; Sedimentology; Paleochannel; Marajó Island; Quaternary. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652008000300017 |
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| Registros recuperados: 28 | |
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