The CRUST project will investigate the oceanography, biology and geology in the southern part of the Ægir Ridge, north of the Faroe Islands. The geology and biology in this area is relatively unexplored but has received increased attention in the last few years for its potential to host ferromanganese (Fe-Mn) crusts and its importance as a region that records the past history of North Atlantic Ocean circulation. This project will integrate high-resolution seafloor mapping, environmental DNA (eDNA) sampling, and geochemical analyses of crusts to assess seafloor dynamics, Fe-Mn crust formation processes, paleoceanographic signals recorded by Fe-Mn crusts, and the biological diversity in the area. The main objective is to enhance our understanding of the ocean floor geological and biological conditions of an underexplored segment of the Atlantic Ocean north of the Faroe Islands. Specific objectives include: obtain bathymetric and sub-bottom profiler data to investigate the different landforms and geological features we can expect in the area for paleoclimate and resources potential studies; obtain samples of Fe-Mn crusts hypothesized to exist on steep scarps of the ridge; and obtain water column and seabed imagery along with water column and sediment samples for environmental DNA studies.