question19 Sep 2019 21:38
kamafugito
Group of ultrapotassic igneous rocks from continental rift zones, including leukitites, olivine melilites, some ultrabasic lamprophyres and some myceae kimberlites (Group II of the ultra-potassic rocks, see Wilson, 1989 )
The term proposed by Sahama, 1974 ( apud Bates & Jackson, Edt ) to designate ultra-saturated rock, sub-saturated in silica, is a composition of the initial syllable of the katungite, mafurite and ugandite rock names.