ENGINEERING PROPERTIES OF IGNEOUS ROCK | Nebeokike .
TYPES OF IGNEOUS ROCKS INTRUSIVE OR PLUTONIC IGNEOUS ROCKS These rocks are formed when magma cools and solidifies within the earth's crust. The magma cools slowly and as a result these rocks are coarse grained Granite EXTRUSIVE OR VOLCANIC IGNEOUS ROCKS These rock is formed when magma exist,cools and solidifies outside or very near the earth's surface.