Features include abyssal hills, aseismic ridges and seamounts.
Explanation:
Ocean basin is a vast submarine region that collects to about "three-fourths" of the earth’s surface. The majority of water on our planet has an average depth of 4 kilometres or 2.5 miles.
The different features of ocean basin include deep-sea trenches, ocean ridges, linear fracture zones, aseismic ridges, abyssal hills, seamounts. Let us discuss few features as follows:
Aseismic ridges: These are the mountainous structures that are long and linear. They usually do not cause earth quakes but they are constructed by volcanoes. A best displayed aseismic ridge which is the largest volcanic edifice is the "Hawaiian-emperor chain".
Abyssal hills: A well-defined submarine that is topologically perfect which is of several hundred meters are abyssal hills. Their diameters are very large. The abyssal sea floor is occupied exclusively by the abyssal hills. These are covered with marine sediments and formed by volcanism and block faulting.
Seamounts: These are the large volcanic submarine mountains that are 3,300 feet above the sea-bed. Of the different types of mountains, the small volcanic seamounts are called sea knolls and the flat ones are called guyots. The flanks of seamounts are covered with thin layers of marine sediments.
