English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/77540
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Post-rift sedimentary evolution of the Gebra Debris Valley. A submarine slope failure system in the Central Bransfield Basin (Antarctica)

AuthorsCasas, David ; Ercilla, Gemma ; García, Marga ; Yenes, Mariano; Estrada, Ferran
KeywordsGebra Valley
Antarctic Peninsula
Mass transport deposits
Issue DateJun-2013
CitationMarine Geology 340: 16-29 (2013)
AbstractThe combined analysis of paleomorphology, stratigraphy and seismic facies allows us to present new insights into the formation and evolution of the Gebra Valley, located on the lower continental slope of the Central Bransfield Basin (NE Antarctic Peninsula). Repeated large-scale slope failure events were responsible for the cut-and-fill features forming the Gebra Valley. This study revealed a mid-Pleistocene Gebra paleovalley that was progressively and completely infilled. During the last glacial cycle the infilled paleovalley was reoccupied, forming the present day Gebra Valley. Both valley incisions are genetically related to large-scale failures associated with high-energy gravity flows or mass flows. The infilling of the valley involved channelized mass flows of various dimensions and channelized and unchannelized turbidity currents. Alternating erosive periods, during which the valley evacuated sediment from the slope toward the basin, and depositional periods, during which it was fully infilled, allows it to be defined as the “Gebra Debris Valley”. Taking into account the presence of faults controlling the headwall locations and the stratigraphic correlation established with glacial periods, the genesis of the Gebra Debris Valley could have been controlled by the interplay of both the tectonic history of the Bransfield Basin and the glacial cycles that allowed grounding events to reach the upper continental slope.
Description14 páginas, 11 figuras, 3 tablas.
Publisher version (URL)http://dx.doi.org/10.1016/j.margeo.2013.04.011
Appears in Collections:(ICM) Artículos
(IACT) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.