What landforms are there at the bottom of the Indian Ocean?

There is a central ridge in the shape of "Zhong", a special ridge at 90 east longitude and a huge underwater alluvial cone at the bottom of the Indian Ocean, which constitutes the complex submarine landform characteristics of the Indian Ocean.

The Central Ridge under the Indian Ocean consists of the Central Indian Ocean Ridge, the Western Indian Ocean Ridge and the Antarctic-Australian Ridge, and the intersection of the three ridges is Rodrigues Island. There is a branch in the northern part of the central ridge, the Central Indian Ocean Ridge, which consists of a series of ridges, generally higher than the basins on both sides by 1300 ~ 2500m, and some islands are formed above the sea surface, such as Rodrigues Island and Amsterdam Island. The middle ridge of the Indian Ocean is called the Arabian-Indian Ridge to the northwest, and then extends westward into the Gulf of Aden, connecting with the Red Sea and the Rift Valley system in East Africa. The West Indian Ocean Ridge is the southwest branch of the Central Ridge, which is connected with the Central Indian Ocean Ridge near Amsterdam. After passing through Edwards Islands, it is called Atlantic-Indian Ocean Ridge, which is connected with the southern end of Atlantic Ridge. The Antarctic-Australian Ridge is the southeast branch of the Central Ridge, which is connected with the Central Indian Ocean Ridge near Amsterdam Island. Meiling in the Central Indian Ocean consists of a series of ridges parallel to the axis of the mid-ridge. The ridge vein is rugged, with the maximum width of 1500km, in which there are many transverse fault zones.