In this paper, we present the preliminary results of the high-resolution study of the seafloor undulations on the outer continental shelf from the southeastern Spanish. Multibeam bathymetry and very high-resolution seismic system TOPAS data have been used. The study area is located between 65 and 105 m depth off the town of Aguilas (Murcia) and Cape Cope. An extensive field of undulations has been described. They are slightly asymmetrical and two types of bedforms of different dimensions can be distinguished: a) Sand waves, with oblique orientation to the current shoreline, its wavelengths vary between 1.5 km and 200 m and its heights range between 2 and 5 m, which are considered relict deposits, possibly formed during the last transgressive period; b) Ripples with NNW-SSE orientation, and its wavelengths and heights are smaller, and its dimensions vary spatially along the SW-NW axis; its origin is attributed to current hydrodynamic regime, whose direction is predominantly northeastward.

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