The document discusses key topics in oceanography including ocean floor features, seafloor sediments, and resources from the seafloor. It defines important terms like continental margin, continental shelf, continental slope, and mid-ocean ridge that describe features of the ocean floor. It also outlines the different types of sediments found on the seafloor including terrigenous, biogenous, calcareous ooze, and siliceous ooze sediments. Finally, it discusses resources extracted from the seafloor like gas hydrates and manganese nodules.