Faulting and instability of shelf sediments: eastern Gulf of Alaska
Faults and submarine slides or slumps are potential environmental hazards on the outer continental shelf of the northern Gulf of Alaska. Submarine slides or slumps have been found in two places in the OCS region: (1) seaward of the Malaspina Glacier and Icy Bay, an area of 1770 square kilometers, that has a slope of less than one-half degree, and (2) across the entire span of the Copper River prodelta, an area of 1730 square kilometers, that has a slope of about one-half degree. Seismic profiles across these areas show disrupted reflectors and irregular topography commonly associated with submarine slides or slumps. Other potential slide or slum areas have been delineated in areas of thick sediment accumulation and relatively steep slopes. These areas include Kayak Trough, parts of Hinchinbrook Entrance and Sea Valley, parts of the outer shelf and upper slope between Kayak Island and Yakutat Bay and Bering Trough.
- Research Organization:
- Geological Survey, Menlo Park, CA
- OSTI ID:
- 6037479
- Journal Information:
- Geology; (United States), Vol. 13
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
58 GEOSCIENCES
54 ENVIRONMENTAL SCIENCES
GULF OF ALASKA
GEOLOGIC FAULTS
OFFSHORE OPERATIONS
RISK ASSESSMENT
SITE SELECTION
CONTINENTAL SHELF
PETROLEUM DEPOSITS
RESOURCE DEVELOPMENT
SEDIMENTS
SEISMIC SURVEYS
CONTINENTAL MARGIN
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
GEOPHYSICAL SURVEYS
MINERAL RESOURCES
PACIFIC OCEAN
RESOURCES
SEAS
SURFACE WATERS
SURVEYS
020200* - Petroleum- Reserves
Geology
& Exploration
580201 - Geophysics- Seismology & Tectonics- (1980-1989)
520500 - Environment
Aquatic- Site Resource & Use Studies- (-1989)