the rock granite igneous intrusive rock

Rock of Ages: The story of British granite- the rock granite igneous intrusive rock ,GRANITE IN SOUTHWEST ENGLAND. The principal granite quarries in England were in Devon and Cornwall, with several quarries in each of the five separate intrusive granite masses which form a chain across the Devon and Cornwall peninsula.Igneous Rocks - ScienceViews.comExtrusive igneous rocks come from lava. Lava, at the surface, is exposed to air and water which causes the molten rock to cool rapidly. Solidifying rocks at the surface cool too quickly for large crystals to form.