Seismic reflection profiles of the United States east coast continental margin. Technical report

Technical Report · Sat Apr 01 04:00:00 EST 1978

OSTI ID:6098201

McGregor, R A

Five profiles of seismic reflection data from the United States east coast are described. From these profiles, two localized areas of extensive slope deposition are identified, one seaward of Albemarle Sound and the other seaward of the Delaware-Maryland-Virginia coast. The profiles show levees along the lower slope and rise portions of some of the major submarine canyons. A regional unconformity on the rise extends from Georges Bank to Wilmington Canyon and is believed to be Pliocene in age. The upper slope between Cape Hatteras and Hudson Canyon is dissected by many small valleys which are believed to have been cut during the late Pleistocene, whereas northeast of Hudson Canyon the upper slope is cut only by major submarine canyons. The Florida-Hatteras slope and Blake Plateau have many unconformities with one in late Tertiary truncating an extensive sequence of foreset beds on the north end of the Blake Plateau. The shelf width and the deposition and erosion pattern of the Florida-Hatteras slope and the adjacent Blake Plateau appear to be controlled by the Gulf Stream.

• Research Organization: National Oceanic and Atmospheric Administration, Miami, FL (USA). Atlantic Oceanographic and Meteorological Labs.
• OSTI ID: 6098201
• Report Number(s): PB-289786
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580203* -- Geophysics-- Geophysical Survey Methods-- (1980-1989)
ATLANTIC OCEAN
CONTINENTAL MARGIN
CONTINENTAL SHELF
EXPLORATION
GEOPHYSICAL SURVEYS
MAPS
NORTH AMERICA
SEAS
SEISMIC SURVEYS
SURFACE WATERS
TOPOGRAPHY
USA