Abstract
De Soto canyon is a curious S-shaped submarine canyon approximately 100 km south-southwest of Pensacola, Florida. Seismic reflection profiling shows that an east-west partially buried shoreline, the influence of at least five salt domes, and erosional and depositional structures are responsible for the peculiar shape of the canyon. The northern bank of the east-west part of De Soto canyon is underlain by what is interpreted as an old shoreline. The north-south-trending part of the canyon is formed by an erosional slope on the east and a depositional slope on the west. Erosion of the east bank and the transgression of the west bank has shifted the canyon bottom to the east. The southern part of the canyon trends south-west because of a subsurface structure, possibly a salt ridge. There is a sediment dam across the southern end of De Soto canyon causing a small basin (43 meters deep) to the north.
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