Douglas G. Masson

Seascape Consultants (United Kingdom)

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P.P.E. Weaver

Seascape Consultants (United Kingdom)

Russell B. Wynn

National Oceanography Centre

Peter J. Talling

Durham University

R. B. Wynn

University of Southampton

Veerle A.I. Huvenne

National Oceanography Centre

Dorrik A. V. Stow

University of Tripoli

Christian Berndt

GEOMAR Helmholtz Centre for Ocean Research Kiel

James V. Gardner

University of New Hampshire

James E. Hunt

National Oceanography Centre

A. B. Watts

University of Oxford

Cooperative Institutions

National Oceanography Centre

University of Southampton

GEOMAR Helmholtz Centre for Ocean Research Kiel

Kiel University

GEOMAR Technologie GmbH - GTG

University of Bremen

United States Geological Survey

University of Cambridge

Graphic Science (United Kingdom)

Consejo Superior de Investigaciones Científicas

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Evidence for changes in Mesozoic and Cenozoic oceanic circulation on the south-western continental margin of Ireland: DSDP/IPOD Leg 80

Geological Society London Special Publications (1986)

P. C. de Graciansky C. Wylie Poag E. A. Hailwood Robert Knox Douglas G. Masson

Summary A transect of four coreholes, drilled by the Glomar Challenger across the Irish continental margin at the Goban Spur, evidences a dynamic palaeoceanographic regime during the late Mesozoic and Cenozoic. Shallow marine waters invaded the rift-stage grabens of the Goban Spur in the early Barremian. Thereafter, the margin subsided rapidly, producing a pelagic depositional regime by late Barremian time. Deep marine conditions were maintained as sea-floor spreading began in the early Albian, and chiefly pelagic deposition continued to the present. Among a series of significant post-rift oceanographic changes, one of the most notable is the familiar fluctuation of oxic and anoxic sea-floor environments during the Cenomanian and Turonian. Another marked change took place during the late Palaeocene, when cooler, oxygen-rich, northern bottom waters reached the Goban Spur as a consequence of rifting and sea-floor spreading between Greenland, Rockall Plateau, and Norway. Later during the Cenozoic, the initial production of Antarctic bottom water, several accelerations of polar icecap growth, and fluctuating eustatic sea-level produced a variety of circulatory shifts on the Goban Spur. A particularly significant sedimentological consequence of these interacting processes was the widespread creation of numerous erosional and non-depositional unconformities.

Continental Margin

Margin (machine learning)

Circulation (fluid dynamics)

10.1144/gsl.sp.1986.021.01.02

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Citations (3)

El Hierro: Shaping of an Oceanic Island by Mass Wasting

Springer eBooks (2003)

Roger Úrgeles Miquel Canals Douglas G. Masson M.J.R. Gee

Mass wasting

Hotspot (geology)

10.1007/978-3-642-55846-7_51

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Citations (4)

Remnants of a submerged pre-Jurassic (Devonian?) landscape on Orphan Knoll, offshore eastern Canada

Canadian Journal of Earth Sciences (1984)

Lindsay M. Parson Douglas G. Masson R.G. Rothwell A. C. Grant

A large group of discrete peaks occurs on the northeastern surface of Orphan Knoll at water depths between 1800 and 2800 m. Long-range side-scan sonographs are used in conjunction with seismic reflection profiles to establish their flattened conical form. They commonly rise to 300 m above the sea floor and occupy basal areas up to 2 km in diameter at that level. Inclusion of the buried lower parts of these mounds may double estimates of both the height and diameter. The sonographs indicate that the mounds have a random distribution within an elongate northwesterly trending belt. Previous suggestions of their possible origin, such as remnants of dykes or ridges of resistant sedimentary strata, are rejected and an alternative explanation of a zone of partially buried Devonian reef knolls is proposed.

Devonian

10.1139/e84-007

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Citations (7)

Eocene deformation on the continental margin SW of the British Isles

Journal of the Geological Society (1983)

Douglas G. Masson Lindsay M. Parson

Two narrow E-W trending zones of late Eocene compressional deformation, one on the northern margin of the Bay of Biscay, the other in the southern Porcupine Seabight, are described. Both appear to follow pre-existing geological lineaments. The deformation is related to the NW movement of Iberia between latest Cretaceous and Late Eocene time.

Continental Margin

Margin (machine learning)

10.1144/gsjgs.140.6.0913

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Citations (29)

The Moira Mounds, small cold-water coral banks in the Porcupine Seabight, NE Atlantic: Part A—an early stage growth phase for future coral carbonate mounds?

Marine Geology (2010)

Andrew J. Wheeler M. Kozachenko Lea‐Anne Henry Anneleen Foubert H. de Haas

Porcupine

10.1016/j.margeo.2010.08.006

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Citations (43)

Offshore continuation of volcanic rift zones, El Hierro,Canary Islands

Journal of Volcanology and Geothermal Research (2001)

M.J.R. Gee Douglas G. Masson A. B. Watts Neil C. Mitchell

Subaerial

Seafloor Spreading

Rift valley

Rift zone

10.1016/s0377-0273(00)00241-9

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Citations (68)

Sedimentary processes in a tectonically active region: Puerto Rico north insular slope: Chapter 8

Kathyryn M. Scanlon Douglas G. Masson

Source

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The origin of deep-water, coral-topped mounds in the northern Rockall Trough, Northeast Atlantic

Marine Geology (2003)

Douglas G. Masson Brian J. Bett D. S. M. Billett C.L. Jacobs Andrew J. Wheeler

Seafloor Spreading

Seabed

Trough (economics)

10.1016/s0025-3227(02)00704-1

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Citations (135)

Widespread fluid expulsion along the seafloor of the Costa Rica convergent margin

Terra Nova (2002)

Gerhard Bohrmann K. Heeschen Carmen Jung Willi Weinrebe Boris Baranov

Active fluid and gas transport were measured and observed along more than 200 km of the convergent margin of Costa Rica during cruise SO144‐2 aboard RV Sonne . Ten profiles were run with the TV‐sled OFOS, eight of which detected the dense occurrence of cold vent sites. This discovery shows that seafloor fluid expulsion is widely spread along the Pacific margin of Costa Rica. Surficial evidence of fluid expulsion is indicated by the appearance of chemosynthetic vent organisms such as bacterial mats, vesicomyid, solemyid and mytilid bivalves and tubeworms. Numerous active vents were indicated by elevated methane concentrations (≤ 200 nmol L – ) in the bottom water. Although fluid‐venting activity was known previously from a small area south of Nicoya Peninsula, the present study documents active seepage at landslides, headwall scarps related to seamount subduction, morphological intersections of faults and mid‐slope mud volcanoes.

Seamount

Seafloor Spreading

Cold seep

Mud volcano

Chemosynthesis

North American Plate

10.1046/j.1365-3121.2002.00400.x

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Citations (100)

Mapping the True 3D Morphology of Deep-Sea Canyons

AGUFM (2010)

Veerle A.I. Huvenne Douglas G. Masson P.A. Tyler V. Huehnerbach

Morphology

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