(Solved): An igneous rock contains several different minerals. How often do they all crystallize at the same ...

An igneous rock contains several different minerals. How often do they all crystallize at the same time? Choose one: A. under certain conditions B. always C. never Show where the volatiles involved in this process enter the mantle and where melting takes place. Do volcanoes form on the subducting or overriding plate? extrusive rocks form flux melting occurs volatiles enter mantle