Echo-character distribution in the Cantabrian Margin and the Biscay Abyssal Plain

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Maestro, Adolfo and Gallastegui, Alba and Moreta, Mercedes and Llave, Estefanía and Bohoyo, Fernando and Druet Vélez, María and Navas, Javier and Mink, Sandra and Fernández Sáenz, Fernando and Catalán, Manuel and Gómez Ballesteros, María and Muñoz Martín, Alfonso and Granja Bruña, José Luis (2021) Echo-character distribution in the Cantabrian Margin and the Biscay Abyssal Plain. Journal of maps, 17 (2). pp. 533-542. ISSN 1744-5647

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Official URL: https://doi.org/10.1080/17445647.2021.1973917



Abstract

In 2003, 2006–2009, 2014 and 2015, seven oceanographic cruises were carried out onboard the Spanish R/V Hespérides in the Cantabrian Margin and the adjacent abyssal plains, covering anarea of 219,124 km2. Based on the combined analysis and interpretation of the bathymetric and reflectivity data obtained with multibeam echosounders (SIMRADEM12, EM120 and EM1002), and ultra-high-resolution reflection seismic records acquired with the SIMRAD TOPASPS18 parametric sounder, the mapping of the acoustic facies or echo-character at a scale of 1:1,200,000 has been carried out. Thirty types of echoes have been differentiated and gather into four main groups: Distinct, Irregular, Hyperbolic and Undulated. The echo-character depends on the acoustic response of the shallow sediment and these a bed morphology. Therefore, its analysis and characterization are basic for understanding recent and present-day sedimentary processes.


Item Type:Article
Uncontrolled Keywords:Bathymetry; Cantabrian Margin; echo-character; parametric echo-sounder seismic profiles; reflectivity
Subjects:Sciences > Geology > Geodynamics
ID Code:68360
Deposited On:27 Oct 2021 06:58
Last Modified:27 Oct 2021 07:42

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