GENERAL GEOLOGY

Detailed explanation-1: -Extrusive, or volcanic, igneous rock is produced when magma exits and cools above (or very near) the Earth’s surface. These are the rocks that form at erupting volcanoes and oozing fissures.

Detailed explanation-2: -Igneous rocks are formed through the cooling of magma or lava. Rocks like granite and basalt are formed when magma cools above the surface of the earth.

Detailed explanation-3: -igneous rock, any of various crystalline or glassy rocks formed by the cooling and solidification of molten earth material.

Detailed explanation-4: -granite, coarse-or medium-grained intrusive igneous rock that is rich in quartz and feldspar; it is the most common plutonic rock of the Earth’s crust, forming by the cooling of magma (silicate melt) at depth.

Detailed explanation-5: -Intrusive igneous rocks cool from magma slowly in the crust. They have large crystals. Extrusive igneous rocks cool from lava rapidly at the surface. They have small crystals. Texture reflects how an igneous rock formed. 10-Oct-2022