Associated with divergent plate boundary. Associated with convergent plate boundary. Associated with intraplates. Refer to appearance of the rock due to size, shape, constituents, arrangement and crystallinity. Augite large with plagioclase enclosed.
Larger crystals enclose small crystals.
E.g. in the figure left above, as the temperature decreased to the liquidus, solid starts to form with a composition close to An. Then the liquid composition changes with the liquidus and the solid composition composition with the solidus. If the reaction between the liquid and the solid is incomplete, early formed An-rich minerals will be in the core and the later formed minerals will be on the outer surface forming zones texture. In the figure right above, If the composition is at Di80, plagioclase will crystallize first, at Eu, Di and An crystallized same time. An could be enclosed by augite to form ophilic texture.