Over 20 000 km of modern 2D data were recently collected (2000–2003) in the Orphan Basin, offshore Newfoundland, by Geophysical Survey Incorporated (GSI) and donated to the Memorial University for research. In spite of being specifically acquired for hydrocarbon exploration with a conventional air-gun array, the data have excellent resolution in the shallow part where reef-like mounds are visible at the water bottom, in 1800–2300 m below sea level. Two seismic lines are used in this paper to illustrate the location, configuration and seismic character of the identified geomounds (Figures 1 and 3 for locations; figures 2, 4–8...

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