Feature

Details

Hydrothermal Vents

Underwater hot springs where seawater, heated by magma, is expelled in mineral-rich plumes.

Ecosystem Base

Microbes that utilize volcanic gases for energy, forming the foundation of the local ecosystem.

Notable Marine Species

- Giant tubeworms

- Spider crabs

- Clams

- Fish

- Octopuses

Scientific Importance

Supports research on deep-sea ecosystems and volcanic activity beneath the ocean floor.

                                                                                                                                                                         Practice Questions:

Q. Consider the following statements regarding the Axial Seamount:

1. It is an underwater volcano located on the Mid-Atlantic Ridge.
   
   
2. It is a shield volcano with a summit caldera and is part of the Ocean Observatories Initiative (OOI).
   
   
3. It is known for supporting a unique marine ecosystem based on hydrothermal vents.
   
   

Which of the statements given above is/are correct?

(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3

Correct Answer: (b) 2 and 3 only

Explanation:

• Statement 1: Incorrect. Axial Seamount is located on the Juan de Fuca Ridge in the Pacific Ocean, not the Mid-Atlantic Ridge.
  
  
• Statement 2: Correct. It is indeed a shield volcano with a summit caldera and forms part of the Ocean Observatories Initiative (OOI).
  
  
• Statement 3: Correct. The volcano is home to hydrothermal vents that support a unique ecosystem with microbes, tubeworms, crabs, and other marine life.