Geography · Geomorphology - Igneous/Primary Rocks
How are primary or igneous rocks formed in the Earth's crust?
- 1By the chemical precipitation of minerals from hypersaline water bodies.
- 2By the cooling and solidification of molten magma or lava.✓
- 3By intense heat and pressure altering pre-existing rocks without melting.
- 4By the accumulation and lithification of organic debris over millions of years.
Correct answer
By the cooling and solidification of molten magma or lava.
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