Example of the rock samples gathered

Example of the rock samples gathered. Photo: Thomas Funck

Rock samples dredged from the Lomonosov Ridge could yield valuable information on the origin of the ridge and could strengthen the argument for a natural prolongation of the Canadian–Greenland Shelf onto the ridge.

On 19 and 20 August 2012 two dredges were undertaken, both by moving Oden up the slope of the Lomonosov Ridge using the ice drift. Dredging took place from water depths of 3,500 m to 2,500 m. The first dredge gathered approximately 100 kg of rock samples and the second approximately 200 kg. Based on a preliminary visual inspection, most of the rock samples are believed to be from an outcrop. Nearly all samples appear to be covered by some kind of ferromanganese crust. Only a few dropstones were found.

Retrieval of dredge

Retrieval of dredge. Photo: Christian Marcussen