IGNEOUS ROCKS
are the most abundant in Earth's crust.
Igneous rocks
They form from volcanic eruptions and molten rock.
Igneous rocks
cool quickly at the surface.
Extrusive igneous rocks
cool slowly beneath the surface.
Intrusive igneous rocks
are examples of extrusive igneous rocks.
pumice and obsidian
are common intrusive igneous rocks used in construction.
Granite and diorite
are considered primary rocks, being the first formed on Earth.
Igneous rocks
The practical applications of igneous rocks, such as pumice in lightweight concrete and granite in building, highlight their economic importance.
Construction materials