Question

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 or semi crystalline form from molten rock material after being poured out on the surface.

• A. i only
• B. All
• C. iii only
• D. i, iii

Answer 1

Answer:

D. i, iii

Volcanicity

• It is also known as volcanic activity or volcanism
• It refers to the geological processes and phenomena associated with the movement, eruption, and emplacement of molten rock material (magma) from within the Earth's crust to the surface or near the surface. 
• It causes the geological process of the solidification of molten rock material (magma) into crystalline or semi-crystalline rock forms after it has been erupted and poured out onto the Earth's surface.
• This process is central to the formation of various types of volcanic rocks and the shaping of volcanic landscapes.
• The solidified products of volcanic eruptions, known as volcanic rocks, include basalt, andesite, rhyolite, and others. These rocks have distinctive textures and mineral compositions.