A sub-bottom reflection survey of the continental shelf, Hudson channel, and Hudson apron has revealed the stratification of the upper layers of sediment. The Hudson apron is a delta, built with sediments brought by the Hudson River when most of the shelf was subaerial. Remarkably well preserved in the apron sediments is a buried wave-cut terrace indicating a former stand of the sea about 165 m below the present level. The Hudson channel consists of a body of disturbed sediments deposited in a broad valley by a meandering stream. The most recent buried channel is traced to the head of the canyon. It was found that the canyon has migrated somewhat to the northeast, and the last 7 km of the canyon head have been cut out since the erosion of the 165-m terrace.
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Ewing et al. (1963) studied this question.
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