8 Extrusive Igneous Rocks Examples
Igneous rocks are found within the earth’s crust. The earth’s interior temperature is high and results in volcanic activity. Molten magma erupts to the earth’s surface, where the temperature is low. Molten magma solidifies rapidly on cooling to form a glassy solid with fine grains. Magma is made of igneous rocks. When molten magma (lava) …