Granite is found in large plutons on the continents in areas where the earth s crust has been deeply eroded.
Why does granite cool slowly.
Igneous rocks that solidify underground cool so slowly because they are insulated.
The formation of granite is sparked by lava eruptions but the lava must contain the same composition as granite rhyolite which is only found on land and is not produced by oceanic volcanoes.
Plutons smaller than 100 square kilometers in the area are called stocks and larger ones are called batholiths.
Usually the grains are randomly arranged with no regular bands or layers.
Granite has a crystalline texture of interlocking mineral grains ranging from 1 5 mm figure 3.
Critics of the biblical age of the earth argue that the texture of granite means it must have cooled very slowly.
Granite must slowly cool in deep locations in order to produce the large grains you see throughout.
However the issue of granite cooling does not stop there.