......................................... 163 Bolivia..................................................amphiboles'. The rocks included are, therefore, the nepheline syenites (phonolites) and ijolites (nephelin...instance, containing normative but not moda.l nepheline, are excluded. However, sometimes these rocks...rocks contain such a high proportion of normative nepheline that it must be present as an occult phase in...numbered rectangle rather than a dot. State, province etc. These are quoted for a number of countries |