Wide‐angle imaging of reflectors in Mesozoic oceanic crust

Two‐ship synthetic aperture data from Mesozoic oceanic crust in the western North Atlantic contain wide‐angle reflections and refractions from oceanic layer 2 at the longer offsets (6–9 km). With appropriate velocity filtering to remove cross‐cutting reflections from the sediment column, the wide‐angle data may be stacked to produce images of the upper oceanic crust. Some dipping events are imaged both near normal incidence and at wide‐angle, and are most likely due to zones of anomalously high impedance. Such zones may be generated by hydrothermal alteration of material in fault zones generated near the spreading center.