Why are igneous rocks crystalline in nature
Answers
Answer:
Because igneous rocks are formed due to volcanic erruption under very temperature and pressure after which they cools down very fast:-)
Answer:
Explanation:The magma which is brought to the surface through fissures or volcanic eruptions, solidifies at a faster rate. Hence such rocks are smooth, crystalline and fine-grained. Basalt is a common extrusive igneous rock and forms lava flows, lava sheets and lava plateaus.
Intrusive igneous rocks-those that congeal at depth- are virtually always crystalline, whereas extrusive igneous rocks, or volcanic rocks, may be partly to entirely glassy. Many factors influence the ability of a magma to crystallize, but the length of time during which cooling occurs is the controlling factor.
Igneous rocks form from the solidification of magma [molten rock]. A remainder: magma is a molten rock beneath the earth's surface and lava is magma that is on the earth's surface. The main characteristics of an Igneous rock are crystal size [grain size].