The ocean basins are characterized by four relief zones: 1. Continental Shelves 2. Continental Slopes 3. Deep Sea Plains 4. Ocean Deeps. Zone # 1. Continental Shelf: The continental marginal areas submerged under oceanic water with average water depth of 100 fathoms (one fathom = 6 feet) and gently sloping (1°- 3°) towards the sea […]