Data/hora: 12/06/2024 19:07:49

Provedor de dados: | 5
País: | France
Título: | Anatomy of a compound delta from the post-glacial transgressive record in the Adriatic Sea
Autores: | Pellegrini, Claudio; Maselli, Vittorio; Cattaneo, Antonio; Piva, Andrea; Ceregato, Alessandro; Trincardi, Fabio.
Data: | 2015-04
Ano: | 2015
Palavras-chave: | Compound delta; Mediterranean Sea; Younger Dryas; Subaqueous clinoform; Transgressive deposits.
Resumo: | On the Mediterranean continental shelves the post-glacial transgressive succession is a complex picture composed by seaward progradations, related to sea level stillstands and/or increased sediment supply to the coasts, and minor flooding surfaces, associated to phases of enhanced rates of sea level rise. Among Late Pleistocene examples, major mid-shelf progradations have been related to the short-term climatic reversal of the Younger Dryas event, a period during which the combination of increased sediment supply from rivers and reduced rates of sea level rise promoted the formation of progradations up to tens-meter thick. While the documentation of coastal and subaqueous progradations recording the Younger Dryas interval are widely reported in the literature, the model of compound progradation within transgressive deposits is not proposed so far. Here we present the documentation of a deltaic system where both delta front sands and related fine-grained subaqueous progradations (prodeltaic to shallow marine) have been preserved. The Paleo Gargano Compound Delta (PGCD) formed offshore the modern Gargano Promontory (southern Adriatic Sea), and is composed by a coastal coarse-grained delta of reduced thickness and a muddy subaqueous clinoform, up to 30 meters thick. The PGCD, probably the first worldwide documentation of a compound delta within the transgressive record, provides the opportunity to investigate the processes controlling the formation of a compound delta system during an overall sea level rise and the factors that allowed its preservation. The finding of the PGCD provides the opportunity of a comparison with modern worldwide compound systems.
Tipo: | Text
Idioma: | Inglês

Identificador:

https://archimer.ifremer.fr/doc/00250/36158/34714.pdf

DOI:10.1016/j.margeo.2015.01.010

https://archimer.ifremer.fr/doc/00250/36158/

Editor: | Elsevier Science Bv
Formato: | application/pdf
Fonte: | Marine Geology (0025-3227) (Elsevier Science Bv), 2015-04 , Vol. 362 , P. 43-59

Fonte:

2015 Elsevier B.V. All rights reserved.

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