Located in the northwestern part of the Aegean region, Dikili- Candarli volcanic suite contains products representative for the western Anatolian Miocene volcanism. They can be divided into two main groups: the Dikili and the Candarli groups. The Dikili group is Early - Middle Miocene in age and consists mainly of pyroclastic rocks, andesitic- dacitic lavas, lava breccia, lahar flows and associated sedimentary rocks. The lavas contain disequilibrium phenocrysts assemblages. The Candarli group consists of Upper Miocene - Pliocene lava and sediment associations. The volcanic rocks consist mainly of rhyolitic domes and basaltic trachyandesite- basaltic andesite lavas erupted along the NW - SE- and NE - SW- trending fault systems; the faults controlled the development of the Candarli depression.