One theory for the origin of this rock involves anatexis and revolves around migmatites. This rock comes in S-types and rarer M-types, while its A-types are now thought to be a form of its I-type, large quantities of which are entirely unique to Earth. Geologists consider it a subclass of a similarly named family of rock which contains an alkali mineral rather than plagioclase, and when used in building, it is often confused with gabbro and gneiss. Rhyolite is compositionally similar to this rock, but is formed extrusively. For 10 points, name this common felsic, intrusive igneous rock contain
One theory for the origin of this rock involves anatexis and revolves around migmatites. This rock comes in S-types and rarer M-types, while its A-types are now thought to be a form of its I-type, large quantities of which are entirely unique to Earth. Geologists consider it a subclass of a similarly named family of rock which contains an alkali mineral rather than plagioclase, and when used in building, it is often confused with gabbro and gneiss. Rhyolite is compositionally similar to this rock, but is formed extrusively. For 10 points, name this common felsic, intrusive igneous rock containing quartz and feldspar, identifiable by its distinct salt and pepper look.
One theory for the origin of this rock involves anatexis and revolves around migmatites.