Q. Which one of the following statements best describes the “Phreatomagmatic Volcanic Eruptions”?

[A] It occurs when magma interacts with water.

[B] These eruptions are characterized by frequent, relatively small explosions of gas and volcanic fragments, often producing incandescent lava fountains and ejecting volcanic bombs and ash into the air.

[C] These are eruptions that occur beneath glaciers or ice caps

[D] These are characterized by the relatively gentle effusion of basaltic lava from fissures or vents.

Answer: A
Notes:

Explanation – Phreatomagmatic eruptions occur when magma comes into contact with water, causing the water to flash into steam, resulting in explosive eruptions. These eruptions are characterized by the explosive release of steam, water, and volcanic materials, such as ash, rocks, and volcanic gases. New islands in Japan are mainly formed through phreatomagmatic eruptions.

Source: ForumIAS

 

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