2005. Integrating ultramafic lamprophyres into the IUGS classification of igneous rocks: Rational and implications. Journal of Petrology, 46(9): 1893-1900. External links IUGS addendum Igneous geology classification flowchart List of alkaline rocks in the Americas Ultrapotassic rocks Ultramafic rocks Mafic rocks Porphyritic rocks Subvolcanic rocks Igneous petrology