Structure and Origin of the Wyville-Thomson Ridge

Roberts, D.G.; Bott, M. H. P.; Uruski, Chris

doi:10.1007/978-1-4613-3485-9_9

Cited by 50 publications

(21 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…3), several large volcanic seamounts with intrusive centers are present. Within the Rockall Trough, basaltic flows and sills have been mapped seismically as far south as 54 °N to just south of the Wyville-Thomson Ridge (Roberts et al, 1981;Roberts et al, 1983). In the latter area, the lava flows thicken abruptly northward of Rosemary Bank seamount to form the volcanic edifice of the Wyville- Thomson Ridge (Roberts et al, 1983 Talwani and Eldholm (1977).…”

Section: Introductionmentioning

confidence: 99%

“…Within the Rockall Trough, basaltic flows and sills have been mapped seismically as far south as 54 °N to just south of the Wyville-Thomson Ridge (Roberts et al, 1981;Roberts et al, 1983). In the latter area, the lava flows thicken abruptly northward of Rosemary Bank seamount to form the volcanic edifice of the Wyville- Thomson Ridge (Roberts et al, 1983 Talwani and Eldholm (1977). The latter feature can be mapped northward as a sinuous feature from the Faeroe-Shetland Channel into the contiguous More Basin (Smythe, 1983;Price and Rattey, in press) where abundant sills and/or flows are present.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Late Paleocene-Eocene Volcanic Events in the Northern North Atlantic Ocean

Roberts¹,

Morton²,

Backman³

1984

Initial Reports of the Deep Sea Drilling Project

View full text Add to dashboard Cite

In the North Altantic area, the thick basalts of Greenland, the Faeroes, and Scotland have been widely considered as a single province related to the early Tertiary rifting. The development of this province in time and space has largely remained unknown because of the lack of relevant geological and geophysical data offshore and the uncertainties of chronostratigraphic correlation between widely separated areas.The Leg 81 results allow late Paleocene-Eocene volcanic events in the North Atlantic to be placed in a consistent spatial and temporal framework. The Leg 81 sites demonstrate the volcanic origin of the dipping reflectors and, using their seismically mapped distribution, allow the first definition of the true extent of the volcanic province associated with rifting. Secondly, the more precise stratigraphy established from the Leg 81 data allows a first correlation between events recorded onshore and offshore. The volcanism took place in two phases entirely during the Anomaly 24B/25 reversed polarity interval. The first phase comprised voluminous effusive volcanism (the dipping reflectors) and was succeeded by pyroclastic volcanism, recorded as ash-fall deposits in the Barents Sea, North Sea, Rockall Plateau, and Bay of Biscay, just prior to the onset of spreading in Anomaly-24B time.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Late Paleocene-Eocene Volcanic Events in the Northern North Atlantic Ocean

Roberts¹,

Morton²,

Backman³

1984

Initial Reports of the Deep Sea Drilling Project

View full text Add to dashboard Cite

show abstract

“…The pronounced basement relief is strongly reflected in the p r e s e n t -d a y seafloor t o p o g r a p h y , although over 1000ms of sediments have accumulated between the banks. The crests of the two banks bear nearly no sediments and are flattened, which -according to Roberts et al (1983) -could be due to 'subaerial erosion of an original volcanic landform'.…”

Section: Acoustic Basementmentioning

confidence: 99%

“…This second extensional phase was accompanied by the massive subaerial extrusion of plateau basalts which flooded large parts of the microcontinent within a few million years. The presence of a thick pile of Palaeocene plateau basalts is well established on the Faeroe Islands, on the northern Rockall Plateau (Laughton et al 1972;Roberts 1975) Roberts et al 1983), zone of dipping reflectors (Andersen 1988), oceancontinent boundary (from Smythe 1983), the southern lava front (from Wood et al 1988), together with relevant DSDP sites. Mercator projection at 60 ~ N.…”

mentioning

confidence: 97%

“…Roberts et al 1983), thus adjoining the Rockall microcontinent in a southwestward direction. This so-called Rockall-Faeroe microcontinent became isolated by two distinct extensional phases: the area was split from the main European continent by an early to mid Cretaceous rifting episode (Roberts 1975;Roberts et al 1983) which created the Rockall Trough and the Faeroe-Shefland Channel. And in late Palaeocene times the RockallFaeroe microcontinent broke away from Greenland, giving way to the opening of the northern North Atlantic.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Seismic stratigraphy of the Bill Bailey and Lousy Bank area: implications for subsidence history

Vanneste

Henriet

Posewang

et al. 1995

View full text Add to dashboard Cite

The present study discusses some results of a reconnaissance seismic survey carried out in 1988 in the area around the prominent Bill Bailey and Lousy Banks, located SW of the Faeroe Islands. The area is thought to be part of the Rockall-Faeroe microcontinent, which was flooded by Palaeocene plateau basalts. The seafloor topography is largely due to the present-day organization of the basalt surface. Important structural features exhibited by this basement are sub-surface diverging reflectors and a major fault.Sediment accumulation is confined to the basinal area where four unconformities were identified. The lower boundary corresponds to the well-known reflector R4 of the North Atlantic. The other unconformities are proposed to correlate with hiatuses at the beginning and end of the middle Miocene, and at the end of the Pliocene, respectively. The sediment units are briefly described by their upper and lower boundary, seismic facies and thickness variations. About the lithology, however, little is so far known. The sediments are deformed by intraformational faults and a diapir-like structure. Both deformational styles are probably related to temporary overpressurisation in fine-grained sediments, but resulting from different causes.Stratal geometric patterns indicate that initially the subsidence of the basalt surface was rather uniform, but became non-uniform after the Eocene/Oligocene boundary, differentiating the two banks from the surrounding basin.

show abstract

Deep structure and origin of the Faeroe — Shetland Channel

Bott

1984

Petroleum Geology of the North European Margin

View full text Add to dashboard Cite

Structure and Origin of the Wyville-Thomson Ridge

Cited by 50 publications

References 11 publications

Late Paleocene-Eocene Volcanic Events in the Northern North Atlantic Ocean

Late Paleocene-Eocene Volcanic Events in the Northern North Atlantic Ocean

Seismic stratigraphy of the Bill Bailey and Lousy Bank area: implications for subsidence history

Deep structure and origin of the Faeroe — Shetland Channel

Contact Info

Product

Resources

About