Crescentic-shaped bedforms in the Garrucha submarine Canyon: when
canyon topography and density flows interplay

Azpiroz Zabala, Maria; López-González, Nieves; Casas, David; Bárcenas, Patricia; Alonso, Belén; Ercilla, Gemma; Mata Campo, Maria Pilar; Palomino, Desirée; Ministerio de Economía y Competitividad (España)

Crescentic-shaped bedforms in the Garrucha submarine Canyon: when canyon topography and density flows interplay

34th International Association of Sedimentologists (IAS) Meeting of Sedimentology, Sedimentology to face societal challenges on risk, resources and record of the past, 10-13 September 2019, Rome.-- 1 page

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Main Authors:	Azpiroz Zabala, Maria, López-González, Nieves, Casas, David, Bárcenas, Patricia, Alonso, Belén, Ercilla, Gemma, Mata Campo, Maria Pilar, Palomino, Desirée
Other Authors:	Ministerio de Economía y Competitividad (España)
Format:	comunicación de congreso biblioteca
Published:	International Association of Sedimentologists 2019-09-10
Online Access:	http://hdl.handle.net/10261/204094 http://dx.doi.org/10.13039/501100003329
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id	dig-icm-es-10261-204094
record_format	koha
spelling	dig-icm-es-10261-2040942022-12-14T12:19:47Z Crescentic-shaped bedforms in the Garrucha submarine Canyon: when canyon topography and density flows interplay Azpiroz Zabala, Maria López-González, Nieves Casas, David Bárcenas, Patricia Alonso, Belén Ercilla, Gemma Mata Campo, Maria Pilar Palomino, Desirée Ministerio de Economía y Competitividad (España) 34th International Association of Sedimentologists (IAS) Meeting of Sedimentology, Sedimentology to face societal challenges on risk, resources and record of the past, 10-13 September 2019, Rome.-- 1 page Submarine canyons are deep incisions acting as sediment pathways that connect shallow continental shelves to deep basins. The sediment from shallow waters can mix with seawater to form downslope running submarine density flows that are extremely powerful. These flows carry crucial nutrients to submarine life, control the hydrocarbon reservoir distribution, and mobilise the seabed sediment to form erosional and depositional features such as bedforms. Previous works have suggested links among the characteristics of the bedforms (e.g. size, shape, grain- size), density flow dynamics and submarine canyon architecture. Recent progress in monitoring technology has allowed a better understanding those links but field measurement are key to correlating that complex interplay. Here we show field measurements collected in the Garrucha Canyon (SW Mediterranean Sea) within the framework of FAUCES project. The measurements comprise: 1) high-resolution bathymetry data acquired by an autonomous underwater vehicle to characterise the submarine canyon; 2) video images recorded by a remote operated vehicle (ROV) of erosional and depositional features; and 3) grain size analysis of 5 micro-cores collected in each ROV dive at different settings within the canyon. The high-resolution bathymetry data show that crescentic-shaped bedforms are common in a section of the canyon floor at 1,500-2,000 m of water depth. The wavelength and wave height of those bedforms spreads from 15 to 120 m and from 1 to 10 m respectively. These bedforms suggest that the floor of the Garrucha Canyon is active. Previous observations in other submarine canyons of similar crescentic-shaped bedforms have been suggested to be related to the transition between supercritical and subcritical flows, and interpreted as cyclic steps. A further analysis of the video images and grain size of the micro-cores might point out the sedimentary process that controls the bedforms of the Garrucha Canyon. The outcome of this work highlights the difficulties to identify a particular bedform as the unique signature of submarine canyon dynamics. It will also provide additional results to achieve an enhanced knowledge of the sedimentary processes within submarine canyon and have potential implications to identify spatial geohazards and benthic ecosystem niches in these submarine environments Contribution from Project FAUCES CTM2015-65461-C2-R (MINECO/FEDER), Spain 2020-03-17T08:38:16Z 2020-03-17T08:38:16Z 2019-09-10 2020-03-17T08:38:16Z comunicación de congreso http://purl.org/coar/resource_type/c_5794 34th International Association of Sedimentologists Meeting of Sedimentology (2019) http://hdl.handle.net/10261/204094 http://dx.doi.org/10.13039/501100003329 #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/CTM2015-65461-C2-R Sí open International Association of Sedimentologists
institution	ICM ES
collection	DSpace
country	España
countrycode	ES
component	Bibliográfico
access	En linea
databasecode	dig-icm-es
tag	biblioteca
region	Europa del Sur
libraryname	Biblioteca del ICM España
description	34th International Association of Sedimentologists (IAS) Meeting of Sedimentology, Sedimentology to face societal challenges on risk, resources and record of the past, 10-13 September 2019, Rome.-- 1 page
author2	Ministerio de Economía y Competitividad (España)
author_facet	Ministerio de Economía y Competitividad (España) Azpiroz Zabala, Maria López-González, Nieves Casas, David Bárcenas, Patricia Alonso, Belén Ercilla, Gemma Mata Campo, Maria Pilar Palomino, Desirée
format	comunicación de congreso
author	Azpiroz Zabala, Maria López-González, Nieves Casas, David Bárcenas, Patricia Alonso, Belén Ercilla, Gemma Mata Campo, Maria Pilar Palomino, Desirée
spellingShingle	Azpiroz Zabala, Maria López-González, Nieves Casas, David Bárcenas, Patricia Alonso, Belén Ercilla, Gemma Mata Campo, Maria Pilar Palomino, Desirée Crescentic-shaped bedforms in the Garrucha submarine Canyon: when canyon topography and density flows interplay
author_sort	Azpiroz Zabala, Maria
title	Crescentic-shaped bedforms in the Garrucha submarine Canyon: when canyon topography and density flows interplay
title_short	Crescentic-shaped bedforms in the Garrucha submarine Canyon: when canyon topography and density flows interplay
title_full	Crescentic-shaped bedforms in the Garrucha submarine Canyon: when canyon topography and density flows interplay
title_fullStr	Crescentic-shaped bedforms in the Garrucha submarine Canyon: when canyon topography and density flows interplay
title_full_unstemmed	Crescentic-shaped bedforms in the Garrucha submarine Canyon: when canyon topography and density flows interplay
title_sort	crescentic-shaped bedforms in the garrucha submarine canyon: when canyon topography and density flows interplay
publisher	International Association of Sedimentologists
publishDate	2019-09-10
url	http://hdl.handle.net/10261/204094 http://dx.doi.org/10.13039/501100003329
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Crescentic-shaped bedforms in the Garrucha submarine Canyon: when canyon topography and density flows interplay

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