Due to the intense heat, this material melts into magma, rising through the continental plate while maintaining a felsic composition as the abundant potassium rich clays recrystallizes back into alkali feldspar.
Due to the intense heat, this material melts into plutonic magma accompanied by a great volume of water. This recycled material rises through the riding continental plate while maintaining a felsic composition as the abundant potassium rich clays recrystallize back into alkali feldspar.