- Data corresponding to SEPM publications are archived and available to the public through this site. Sources of data include the Journal of Sedimentary Research, PALAIOS, and data from other types of SEPM publications. This site is hosted by the World Data Center A for Marine Geology and Geophysics, collocated with the NOAA National Geophysical Data Center (NGDC).www.ngdc.noaa.gov/mgg/sepm/sepm.html