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Popescu, Irina; Lericolais, Gilles; Panin, N; Wong, H; Droz, Laurence. |
Analysis of new high-resolution seismic-reflection profiles, chirp profiles and previously published sidescan data, together with piston cores on the Danube Fan provide new insight into the recent sedimentation processes in the deep northwestern Black Sea.The latest channel-levee system on the Danube Fan developed probably during the Neoeuxinian lowstand (oxygene isotope stage 2) in a semi-freshwater basin with a water level about 100 m lower than today. Sediment supplied by the Danube was transported to the deep basin through the Viteaz Canyon, which was directly connected to the leveed channel of this system on the middle slope. Channel avulsion was common in the middle fan, as indicated by four main phases of bifurcation. Each phase developed after the... |
Tipo: Text |
Palavras-chave: High resolution seismic; Late Quaternary; Avulsion; Deep sea fan; Black Sea. |
Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/2001/publication-474.pdf |
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Nascimento,Alexandre Ferreira do; Furquim,Sheila Aparecida Correia; Couto,Eduardo Guimarães; Beirigo,Raphael Moreira; Oliveira Júnior,Jairo Calderari de; Camargo,Plínio Barbosa de; Vidal-Torrado,Pablo. |
The Pantanal region can be characterized as a quaternary floodplain with predominant sedimentation in the form of alluvial fans. In the geomorphologic and sedimentary evolution, the avulsion process is inherent to this depositional system and its dynamics, together with surface water floods, influence soil sedimentation on this plain. The knowledge and differentiation of these two events can contribute to a better understanding of the variability of soil properties and distribution under the influence of these sedimentation processes. Therefore, this study investigated the genesis of soils in the Northern Pantanal with textural contrasts in deeper horizons and their relationship with the depositional system dynamics. We analyzed four soil profiles in the... |
Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alluvial soils; Hydromorphic soils; Fluvial deposition system; Alluvial fans; Avulsion. |
Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000500001 |
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