The deep-sea Armorican depositional system (Bay of Biscay), a multiple source, ramp model

The deep-sea Armorican depositional system (Bay of Biscay), a multiple source, ramp model

The deep-sea Armorican depositional system, located in the central part of the Bay of Biscay, is a medium-sized turbidite system with a surface area of more than 30,000 km super(2). The whole system is a mud/sand-rich submarine ramp on a passive margin. The medial ramp is characterised by the presen...

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Veröffentlicht in:Geo-marine letters 2001-05, Vol.20 (4), p.219-232
Hauptverfasser: S., Zaragosi, Suav, R. Le, J.-C., Faug res, J.-F., Bourillet, G., Auffret, C., Pujol, T., Garlan
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Environmental Sciences
Marine
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container_end_page 232
container_issue 4
container_start_page 219
container_title Geo-marine letters
container_volume 20
creator S., Zaragosi
Suav, R. Le
J.-C., Faug res
J.-F., Bourillet
G., Auffret
C., Pujol
T., Garlan
description The deep-sea Armorican depositional system, located in the central part of the Bay of Biscay, is a medium-sized turbidite system with a surface area of more than 30,000 km super(2). The whole system is a mud/sand-rich submarine ramp on a passive margin. The medial ramp is characterised by the presence of six distinct tributary channels which form three systems: the Guilcher, Crozon and Cornouaille systems. The distal ramp corresponds to divergent braided secondary channels and associated lobes. Variations in hydrodynamic conditions on the outer Armorican Shelf during the last climatic cycle are the major factor controlling facies shifts and system growth. Thus, the Armorican depositional system is a delta-fed submarine ramp during low sea-level glacial conditions, and an outer shelf-fed submarine ramp at times of sea-level rise.
doi_str_mv 10.1007/s003670100061
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title The deep-sea Armorican depositional system (Bay of Biscay), a multiple source, ramp model
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