9 Questions
What is the main process involved in the formation of igneous rocks?
Cooling and solidification of magma or lava
Where does the magma, which forms igneous rocks, come from?
Partial melts of existing rocks in a planet's mantle or crust
What are the two main types of igneous rock solidification processes mentioned in the text?
Intrusive and extrusive
What percentage of the top 16 kilometers of the Earth's crust by volume is composed of igneous and metamorphic rocks?
90–95%
What is the characteristic of intrusive igneous rocks due to slow cooling within the crust?
Coarse-grained (phaneritic)
Which type of igneous rock is typically associated with important mineral deposits such as tungsten and tin?
Granite
What is the term for the extrusive igneous rock that forms lava flows, lava sheets, and lava plateaus?
Basalt
What are the intrusive igneous rocks that form near the surface termed as?
Subvolcanic
Which type of intrusive igneous rock is usually much finer-grained and often resembles volcanic rock?
Hypabyssal rock
Test your knowledge about the formation and characteristics of igneous rocks, formed through the cooling and solidification of magma or lava. Learn about the processes of melting, solidification, and the characteristics of these magmatic rocks.
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