%paragenesis%

n. [ Pref. para- + genesis. ] 1. (Min.) The science which treats of minerals with special reference to their origin. [ 1913 Webster ]

2. (Geol.) (a) The formation of minerals in contact, so as to affect one another's development. (b) The order in which minerals occurring together in rocks and veins have developed. [ Webster 1913 Suppl. ]