The name for such a hole is "caldera" which is a word of Spanish origin meaning "a pot" or a "cooking pot" (thing of cauldron!) - and this word is used because it resembles the shape of this hole.
Often the Calderas are filled with water forming lakes and often there is an island in the middle of the water.
It can lead to food Scarcity, since the erosion will wash away the food which farmers have planted.
This is normal polarity case if u look u can clearly see it’s normal
Indian ocean
Atlantic ocean
pacific ocean
