A very rough morphology with main features oriented E-W was evidenced. We dredged two reliefs E of Spiess. In the Northern one (17) we sampled hydrothermally altered basalts with chlorite, calcite, quartz, sulphides, some of them tectonized. The station on southernmost relief (18) revealed the presence of slightly altered Cpx-Ol-Pl phyric and aphyric basalts covered by Fe-Mn crusts. A complex magnetic anomaly pattern is probably due to strong tectonics.