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Slumping and shallow faulting related to the presence of salt on the Continental Slope and Rise off North Carolina

Marine and Petroleum Geology

By:
and
DOI: 10.1016/0264-8172(85)90016-9

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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. ?? 1985.

Additional Publication Details

Publication type:
Article
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
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Marine and Petroleum Geology
First page:
260
Last page:
271