A granite cliff deep in the North Atlantic

Pautot, Guy; Renard, Vincent; Auffret, Gérard-André; Pastouret, Léo; Charpal, O. De

doi:10.1038/263669a0

Cited by 32 publications

(25 citation statements)

References 2 publications

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“…The Gorringe Bank is interpreted as a Late Cretaceous and Tertiary compressional intraoceanic ridge superimposed on a transform-fault of Early Jurassic age (CYAGOX GRouP 1984). Submarine cliffs along the distal continental margin with granitic rock wails open for erosion are described from the present day Bay of Biscaye (PAuTOT et al 1976). In the case of the South Pennine units the situation is most complex because granitic and ophiolitic clasts occur together in various subaqueous gravity flow deposits.…”

Section: D0vosmentioning

confidence: 99%

A transform margin in the Mesozoic Tethys: evidence from the Swiss Alps

Weissert

Bernoulli²

1985

Geol Rundsch

150

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Section: D0vosmentioning

confidence: 99%

A transform margin in the Mesozoic Tethys: evidence from the Swiss Alps

Weissert

Bernoulli²

1985

Geol Rundsch

150

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“…3b), the bathymetric trends towards Trevelyan, the lack of magnetic anomalies, and the seismic reflection features of Montadert et al, (1974) all suggest that this region may also be of continental-type material. Continental granitic basement has been sampled at the foot of the slope on the western part of the margin near 48°N, 12°W at a comparable depth to the Trevelyan area (Pautot et al, 1976;Didier et al, 1977;Auffret et al, this volume). It therefore appears that the continental structure does stretch out as far west as the Trevelyan escarpment, i.e., a horizontal prolongation of about 140 km of the continental slope is envisaged.…”

Section: Discussionmentioning

confidence: 99%

Preliminary Results of a Seismic Refraction Study in the Meriadzek-Trevelyan Area, Bay of Biscay

Avedik¹,

Howard²

1979

Initial Reports of the Deep Sea Drilling Project

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Seismic refraction studies over the Meriadzek-Trevelyan area in the north of the Bay of Biscay have established four main geological sequences: Cenozoic (1.9 to 2.8 km/s); Cretaceous (3.2 to 4.0 km/s); lower to middle Mesozoic (4.5 to 5.0 km/s); pre-Mesozoic (5.4 to 6.3 km/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 inteΦreted as a southwestward prolongation of the continental structure. The blockfaulted 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.

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“…Oceanic basement can be also identified independently by its pattern of marked magnetic anomalies (Roberts and Jones, 1975) and its seismic refraction characteristics. Before Leg 80 neither oceanic nor continental basement rocks had been drilled seaward of the continental shelf, although several dredges had recovered granitoids, metasedimentary rocks, and shallow-water carbonates and sandstones of late Paleozoic age from the Hercynian continental basement in the vicinity of the Goban Spur (Pautot et al, 1976;Auffret et al, 1979). The seawardmost released well on the continental shelf in the Western Approaches Basin {Zephyr 83/2H-1; Fig.…”

Section: Seismic Basementmentioning

confidence: 99%