part of has part overlaps continental shelf continental slope continental rise sea floor slope continental margin A slope which is part of the seafloor, descends from the continental crust to the oceanic crust, and comprises the continental shelf, continental slope, and continental rise. envoPolar SWEETRealm:ContinentalMargin 2013-10-18T00:04:57Z EcoLexicon:continental_margin ORCID:0000-0002-4366-3088 On Earth, continental margins constitute about 28% of the oceanic area. continental crust oceanic crust