Slumping and shallow faulting related to the presence of salt on the Continental Slope and rise off North Carolina
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Abstract
Seismic reflection profiles and long- and medium-range sidescan sonar were used to investigate a salt diapir complex and area of slope instability near the base of the Continental Slope off North Carolina. Within the area of investigation three diapirs are bounded on their upslope side by a scarp 60 m high and 50 km long. The slope above the scarp is characterized by a series of shallow rotational normal faults. The bottom below the scarp is furrowed by slide tracks, which were probably carved by large blocks that broke off the scarp face and slid downslope leaving rubble and scree lobes. Extensive slumping in this area appears to be a result of uplift and faulting associated with salt intrusion, which has fractured and oversteepened the slope leading to instability and failure. Sharply defined slide tracks suggest that slope failure above the breached diapir complex is a continuing process, in contrast to much of the surrounding slope area where few instability features were observed.
Study Area
Publication type | Article |
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Publication Subtype | Journal Article |
Title | Slumping and shallow faulting related to the presence of salt on the Continental Slope and rise off North Carolina |
Series title | Marine and Petroleum Geology |
DOI | 10.1016/0264-8172(85)90016-9 |
Volume | 2 |
Issue | 3 |
Year Published | 1985 |
Language | English |
Publisher | Elsevier |
Contributing office(s) | Woods Hole Coastal and Marine Science Center |
Description | 12 p. |
Larger Work Type | Article |
Larger Work Subtype | Journal Article |
Larger Work Title | Marine and Petroleum Geology |
First page | 260 |
Last page | 271 |
Country | United States |
State | North Carolina |
Other Geospatial | Carolina Trough, Continental Slope |
Google Analytic Metrics | Metrics page |