How are igneous rock classifield?

Answer 1

Igneous rocks are classified based on their mineral composition and texture. They are divided into two main categories: intrusive (or plutonic) rocks, which form from magma that cools slowly beneath the Earth's surface, and extrusive (or volcanic) rocks, which form from lava that cools quickly at the surface. Additionally, igneous rocks can be further categorized into felsic, intermediate, mafic, and ultramafic types based on their silica content and mineral characteristics.