No abstract

Principal Results: Site 346 was located on the Jan Mayen Ridge. Pliocene and Pleistocene sediments extend from the top to a depth of 25.5 meters and consist of terrigenous sandy mud, as well as mud and clay. The middle Miocene sediments consist of sandy mud and biogenic siliceous oozes characterized by a high percentage of sponge spicules. Below the Miocene section is a massive terrigenous sandy mudstone. This unit was quite hard to penetrate, and is almost completely barren of fauna except for arenaceous foraminifera (benthonic), and a few badly preserved calcareous foraminifera.