Continuous seismic profiling on the continental shelf off Rhode Island has revealed a fault that strikes north-south and dips to the east. The fault appears near Block Island, Rhode Island, and is traceable 60 km seaward. It is either middle to late Tertiary in age or perhaps was active from pre-Cretaceous to upper Tertiary time. No apparent relationship can be established with known mainland faults of southeastern Connecticut and southern Rhode Island and outer shelf structural features.

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