Blake Outer Ridge: Development by Gravity Tectonics

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Science  05 May 1967:
Vol. 156, Issue 3775, pp. 642-645
DOI: 10.1126/science.156.3775.642


A continuous seismic profile across the Blake Outer Ridge reveals clear evidence of a structural origin for the ridge. A ridge core separates distinctive regions of structure east and west of the crest and does not support a theory of depositional origin. The presence of horizon A continuously beneath the ridge rules out faulting or folding involving basement rocks. Gravity tectonics are suggested as the mechanism for formation of the ridge after the deposition of the sediments above horizon A.