Preliminary results of a seismic refraction study in the Meriadzek-Trevelyan area, Bay of Biscay

Auteurs :
AVEDIK, F.
HOWARD, D.

Description :
Four main geological sequences have been established: Cenozoic (1.9 to 2.8km/s)| Cretaceous (3.2 to 4.0km/s)| lower to middle Mesozoic (4.5 to 5.0km/s)| pre-Mesozoic (5.4 to 6.3km/s). These agree broadly with the adjoining western approaches and English Channel areas to the northeast. The sub-sedimentary structure between the Meriadzek Terrace and the Trevelyan escarpment is of continental origin having a block-faulted pattern and is interpreted as a southwestward prolongation of the continental structure. The block-faulted form is considered to have originated during the rifting of the Armorican Continental margin and may have been influenced by a tectonic Pattern caused by the earlier activity of the south Armorican shear zone.


Type de document :
Article de périodique

Source :
Publications du Centre National pour l'Exploitation des Océans. Recueil des travaux du Centre océanologique de Bretagne Brest, 1980, n°. 8, p. 379-387, Références bibliographiques : 24 réf.

Date :
1980