Scattered volcanism at a small volume and extent is present in the Central Aegean region, between 17 and 13 Ma. It is only specific to small manifestations in Skyros, Psara and ChiosM, while larger formations are found in Central Euboia (Oxylithos and Orio).

A series of granites are present in Cyclades and the Eastern Aegean; their age varies between 17 and 8.5 Ma. The oldest of them are located in Ikaria, Tinos, Mykonos, Dilos, Naxos and Keros. Newer granites are present in Serifos and Lavrio, as well as in Kos, Samos and Alikarnassos (Bodrum) in Asia Minor; their age is between 10-8.5 Ma.