The Meidob volcanic field has erupted basalt, basanite, hawaiite as well as benmoreite, mugearite, phonolite and trachyte, forming an alkaline suite of volcanic rocks. Various types of xenoliths are present in the eruption products, while phenocrysts include aegirine, amphibole, anorthoclase, augite, biotite, ulvospinel-magnetite, nepheline olivine, augitic-diopsidic pyroxene and sanidine.