Multiple choice

Consider the following statements: 'Vulcanicity' refers to

  1. all those processes in which molten rock material or magma rises into the crust.
  2. the greater bulk of the volcanic rocks of the earth's surface were erupted from volcanoes.
  3. the process of solidification of rock into crystalline of semicrystalline from molten rocks material after being poured out on the surface. Which of the statements given above are correct?

  1. 1, 2 and 3

  2. 1 and 2

  3. 2 and 3

  4. 1 and 3
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Vulcanicity encompasses all processes where magma rises into the crust (1) and solidifies (3). Statement 2 is incorrect because most volcanic rocks on Earth's surface come from fissure eruptions and extensive lava plateaus, not from individual volcanic cones. The bulk of volcanic material is extruded through cracks, not central volcanoes.

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