Yes I joke. However, a quartz diorite is not any kind of
tonalite. Tonalite is field 5 on the QAPF diagram and quartz diotite
is field 10star! And, yes this is the IUGS classification blue bible
by LeMaitre (1989). Adakite doen't exist in the blue book. According
to a good number of igneous petrologists, this suggested volcanic
rock name is useful. Others think not. I side with the minority!
With further amusement,