Morphobathymetric data showed interesting structure. South of 54 45'S average depth deepens to 2500-3000 m to form a depression with rough morphology. Highest relief (1400 m) is located WSW of Spiess. From its northern flanks (10) we recovered olivine basalts, Cpx-Ol-Pl phyric and vesicular aphyric basalts.
The southern part of this area is characterized by troughs that surround a triangular relief 2200 m high. The northern flank of this relief was sampled (20,21), alongwith the walls of the eastern trough. We found slightly altered Cpx-Ol-Pl phyric and aphyric basalts covered by Fe-Mn crust. Magnetic anomalies are negative for both the reliefs.