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Coastal sand dunes at 100m under sea level as proof of a post Younger-Dryas Black Sea lowstand ArchiMer
Lericolais, Gilles; Bulois, C; Gillet, H.
A 3D geometric interpretation of very high-resolution seismic Chirp profiles acquired on the Romanian shelf demonstrates that the last climate change known during Holocene times was well recorded in the Black Sea basin and particularly provides a good record of its water level fluctuations.
Tipo: Text Palavras-chave: Pseudo 3D; Seismic sequences; Rapid transgression; Forced regression.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/acte-4936.pdf
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High frequency sea level fluctuations recorded in the Black Sea since the LGM ArchiMer
Lericolais, Gilles; Bulois, C.; Gillet, Herve; Guichard, F..
This paper presents a 3D geometric interpretation of very high resolution seismic Chirp profiles acquired on the Romanian shelf during ASSEMBLAGE European Project. The results provide a solid record of the Black Sea Last Glacial Maximum (LGM) water level fluctuations. This pseudo-3D seismic interpretation shows that the Black Sea lacustrine shelf deposits form a significant basinward-prograding wedge system. on top of these prograding sequences is a set of sand dunes that delineates a wave cut-terrace like feature around the isobath -100 m. Landward of this dune field are small depressions containing barkhan-like bodies. The upper part of the last prograding sequence is incised by anastomosed channels which end in the Danube (Viteaz) canyon which are also...
Tipo: Text Palavras-chave: Black Sea; Enclosed basin; Forced regression; Rapid transgression; Sea level changes.
Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/publication-6587.pdf
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Water-level fluctuations in the Black Sea since the Last Glacial Maximum ArchiMer
Lericolais, Gilles; Popescu, I; Guichard, F; Popescu, S. M..
Two IFREMER oceanographic surveys carried out in the northwestern Black Sea in 1998 and 2002 complement previous seabed mapping and subsurface sampling by various international expeditions. They show that the lake level rose on the continental shelf to at least the -40 to -30 m isobath based on the landward limit of a Dreissena layer representative of very low salinity conditions (<50/00). The Black Sea then shows clear evidence for an onset of marine conditions at 7150 BP. From these observations, Ryan et al. (1997) concluded that the Black Sea could have filled abruptly with saltwater cascading in from the Mediterranean. Despite critical discussions of this interpretation, recent IFREMER discoveries of well preserved drowned beaches, sand dunes, and...
Tipo: Text Palavras-chave: Black Sea continental shelf; Bosphorus outlet; Multibeam geomorphology; Seismic stratigraphy; Younger Dryas; Rapid transgression.
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-6267.pdf
Registros recuperados: 3
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