 St. Helena Seamount chain

The St. Helena Seamount Chain is a series of underwater volcanic mountains (seamounts) located in the South Atlantic Ocean, near the island of St. Helena. This chain extends northward from the island, which is known for its remote location and historical significance as the exile site of Napoleon Bonaparte. The seamount chain is believed to have formed as a result of volcanic activity associated with a hotspot, which is a plume of hot material rising from deep within the Earth's mantle.