FN Archimer Export Format
PT J
TI High frequency sea level fluctuations recorded in the Black Sea since the LGM
BT 
AF LERICOLAIS, Gilles
   BULOIS, C.
   GILLET, Herve
   GUICHARD, F.
AS 1:1;2:1,2;3:1,3;4:4;
FF 1:PDG-DOP-DCB-GM-LES;2:;3:;4:;
C1 IFREMER, Ctr Brest, F-29200 Plouzane, France.
   Univ Coll Dublin, UCD Sch Geol Sci, Dublin 4, Ireland.
   Univ Bordeaux 1, EPOC, UMR 5805, F-33405 Talence, France.
   CEA, CNRS, LSCE, F-91198 Gif Sur Yvette, France.
C2 IFREMER, FRANCE
   UNIV COLL DUBLIN, IRELAND
   UNIV BORDEAUX, FRANCE
   CEA, FRANCE
SI BREST
SE PDG-DOP-DCB-GM-LES
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-univ-france
IF 3.272
TC 65
TU Centre national de la recherche scientifique
   Commissariat à l'énergie atomique et aux énergies alternatives
   Université de Bordeaux
   Université de Versailles Saint-Quentin-en-Yvelines
   École pratique des hautes études
UR https://archimer.ifremer.fr/doc/2009/publication-6587.pdf
LA English
DT Article
CR ASSEMBLAGE 2 - HYBLACK 3D
   BLASON
   BLASON 2
   MD 139 / ASSEMBLAGE - 1
BO Mare Nigrum
   Le Suroît
   Marion Dufresne
DE ;Black Sea;Enclosed basin;Forced regression;Rapid transgression;Sea level changes
AB 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 built on the lacustrine prograding wedge. Ten stratigraphic units were distinguished and correlated with analyses of cores retrieved from this area. The results demonstrate that the first eight sequences represent lacustrine prograding wedges, the ninth sequence is the dune system itself and the tenth is a marine mud drape which covers the entire continental shelf. The lacustrine prograding wedges represent a lowstand deposit characterised by forced regression-like reflectors mapped from the pseudo-3D seismic data. Their hinge point corresponds to the wave erosion surface mapped around -100 m isobath on the multibeam mosaic. Dated cores give age control on this lowstand period, which lasted from 11 to 8.5 kyr C-14 BP as implied by: (1) the continuously dry climatic conditions in the region inferred by high percentages of herbs and steppe elements determined from ASSEMBLAGE cores and, (2) the formation of dunes between 10 and 8.5 kyr C-14 BP on the desiccated north-western Black Sea shelf at -100 m and (3) all of these covered by a marine mud drape confirming that the dune system is no longer active. The buried, anastomosed fluvial channels that suddenly disappear below 90 m depth, and a unique wave-cut terrace between 95 and 100 mbsl on the outer shelf are also consistent with a major lowstand base-level at around -100 m water depth. Preservation of sand dunes and the occurrence of small, buried incised valleys mark a rapid transgression within less than a century during which ravinement processes related to the water level rise had no time to significantly erode the seafloor. (C) 2008 Elsevier B.V. All rights reserved.
PY 2009
PD MAR
SO Global and Planetary Change
SN 0921-8181
PU Elsevier
VL 66
IS 1-2
UT 000267435700007
BP 65
EP 75
DI 10.1016/j.gloplacha.2008.03.010
ID 6587
ER

EF