The Marine-Geo Digital Library is a digital data repository and metadata catalog funded by the U.S. NSF for marine geoscience data from the seafloor and subseafloor environment acquired with ships, towed platforms and submersibles. We accept submissions of derived data products and supporting field data and provide repository services including data publication, open public access and long term archiving. Primary data types are geophysical field data including active source seismic data, potential field, bathymetry, sidescan sonar, near-bottom imagery, other seafloor senor data as well as a diverse array of processed data and interpreted data products (e.g. seismic interpretations, microseismicity catalogs, geologic maps and interpretations, photomosaics and visualizations). Our data resources support scientists working broadly on solid earth science problems ranging from mid-ocean ridge, subduction zone and hotspot processes, to geohazards, continental margin evolution, sediment transport at glaciated and unglaciated margins.