You stop along the side of the highway to look at a 1,000 m. high outcrop. You decide to climb tothe outcrop and look at the rocks. The base of the outcrop has a layer of olivine and calciumplagioclase. 100 meters up the cliff the rock is pyroxene and a sodium-bearing calcium plagioclase. At 350 meters, the rock contains amphibole and a calcium-bearing sodic plagioclase. At 650meters, the minerals are biotite and sodium plagioclase. From 900 meters to the top the rock isgranite. Explain how this out crop could have been formed.