The primary goals of Leg 174A were to (1) date as precisely as possible sequence boundaries of Oligocene to Pleistocene age, and compare this stratigraphic record with the timing of glacial eustatic changes inferred from deep-sea delta18O variations; (2) place constraints on the amplitudes and rates of sea-level change that may have been responsible for unconformity development; (3) assess the relationships between depositional facies and sequence architecture; and (4) provide a baseline for future scientific ocean drilling that would address the effects and timing of sea-level changes on this and other passive continental margins. An additional goal for Leg 174A was technical. The leg represented the first attempt by scientific ocean drilling in almost 30 yr to sample a thickly sedimented, continental margin in water less than 150 m deep. Two sites (Sites 1071 and 1072) are located on the outer part of the continental shelf in water depths of 88-90 and 98 mbsl, respectively. An additional site (Site 1073) is located on the uppermost continental slope, part of the Hudson Apron, in a water depth of 638 mbsl.

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