Q: (SSC/0)
question_subject:
Geography
question_exam:
SSC
stats:
0,23,13,23,3,9,1
keywords:
{'crust': [1, 1, 0, 0], 'sedimentary': [0, 0, 0, 1], 'igneous': [2, 0, 0, 1], 'rock': [0, 0, 0, 1], 'earth': [0, 1, 1, 1], 'carbonate': [1, 0, 0, 0], 'metamorphic': [2, 0, 0, 2]}
The majority of Earth`s crust is composed of igneous rock, which is formed from solidified lava or magma. Igneous rocks are characterized by their crystalline structure and can be classified into two main types: intrusive and extrusive. Intrusive igneous rocks are formed beneath the Earth`s surface when magma cools and solidifies slowly, allowing for the formation of large mineral crystals. Extrusive igneous rocks are formed on the Earth`s surface when lava cools and solidifies quickly, resulting in smaller mineral crystals. Examples of igneous rocks include granite, basalt, and pumice. While metamorphic, sedimentary, and carbonate rocks also make up a significant portion of the Earth`s crust, igneous rocks are the most abundant.