United States Naval Oceanographic Office Marine Geophysical Survey Program, 1965-1967, North Atlantic Ocean, Norwegian Sea, and Mediterranean Sea, Area 2, Volume 5. Geology and Geophysics.

The physiographic provinces defined by Heezen et al (1959) and delineated over much of the North Atlantic are reasonably well-developed in the southern part of the area (47N-52 degrees N). At approximately 52 degrees N, the ocean floor is disrupted by Rockall rise, an aseismic feature which is 200 m...

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Bibliographic Details
Other Authors: TEXAS INSTRUMENTS INC DALLAS SCIENCE SERVICES DIV
Format: Text
Language:English
Published: 1968
Subjects:
Physical and Dynamic Oceanography
(*ATLANTIC OCEAN
MARINE GEOPHYSICS)
(*MEDITERRANEAN SEA
ECHO RANGING
REFLECTION
SEDIMENTATION
OCEAN BOTTOM TOPOGRAPHY
BATHYTHERMOGRAPH DATA
OCEANOGRAPHIC SHIPS
NAVIGATION CHARTS
DISTRIBUTION
MAPS
THICKNESS
CONTINENTAL SHELVES
NORWEGIAN SEA
HYDROGRAPHIC SURVEYING
ROCK
ARCTIC SEAL VESSEL
ATLANTIC SEAL VESSEL
CONTINENTAL SHELF
LAYERS(MARINE)
NORTH ATLANTIC OCEAN
Arctic
Mid-Atlantic Ridge
Norwegian Sea
North Atlantic
Online Access:http://www.dtic.mil/docs/citations/AD0842567
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=AD0842567
Description
Summary:The physiographic provinces defined by Heezen et al (1959) and delineated over much of the North Atlantic are reasonably well-developed in the southern part of the area (47N-52 degrees N). At approximately 52 degrees N, the ocean floor is disrupted by Rockall rise, an aseismic feature which is 200 mi wide and 600 mi long and occupies approximately one-half of the area between the ridge crest and the continental margin. A segment of the mid-oceanic ridge lies west of Rockall. Topographic expressions of an E-W offset to the ridge are seen in the displacement of a linear trend of seamounts and a trough which appears to be of fault origin. Distribution of sediments in Area 2 is controlled by topographic expressions of the continental margin, Rockall rise, and Mid-Atlantic ridge. The provinces adjoining the continent are characterized by thick sequences of coarse terrigenous sediments. The region surrounding Rockall rise and plateau receive slump-derived material in addition to pelagic sedimentation. The Mid-Atlantic ridge contains marked degrees of sediment accumulation. The sharp peaks are sparsely mantled due to sediment instability. Sediments from these peaks, along with normal pelagic processes, produce the flat-floored basins characteristic of the ridge. (Author)

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