Enchanted Rock in Texas is formed from a pink form of this rock, which often occurs in plutons due to the high viscosity of the magma that forms this substance.
S-types of these rocks are produced from sediments high in SiO2s while I-types typically from crystal fracination with limited weathering in the Chappell-White classification scheme for these kinds of rocks. Isolated deposits of this rock embedded with gabbro are thought to be associated with the Cape Ann earthquake. An unusual version of this rock called "orbicular" is mostly found in Finland and weathering of this material by contact with water can produce kaolin. Enchanted Rock in Texas is formed from a pink form of this rock, which often occurs in plutons due to the high viscosity of the magma that forms this substance. Often formed at continental margins rather than mid-continental rifts, large, unbroken deposits of this type of intrusive rock are known as batholiths, such as the Sierra Nevada. For 10 points, identify this felsic mineral that often forms domes like Stone Mountain.
S-types of these rocks are produced from sediments high in SiO2s while I-types typically from crystal fracination with limited weathering in the Chappell-White classification scheme for these kinds of rocks.
{Granite}