The world’s oceans are a distinctive feature of the Earth

The global distribution of the world’s oceans:

The relief of ocean basins:

Water deepens along continental shelf.
Slope angle increases at continental slope.
Wide, gently sloping continental rise.
Flattest and deepest section abyssal plain which includes seamounts with flattened tops that do not extend beyond the water surface due to erosion called guyots.
Rift valley = a valley formed by downfaulting between parallel faults.
Occur along the centre of mid-oceanic ridges which can be marked by mountains.
Oceanic trench = A narrow and deep depression on the ocean floor, adjacent to a subduction zone.