For the first time, trace fossils typical for the Triassic carbonates have been identified in the Keban metamorphites.
Early Triassic age “microgastropods” have been found in Keban metamorphites.
Pre-Triassic aged metadiabase dykes have been inserted in the Keban metamorphites in relation with the Variscan Orogeny.
The Keban metamorphites resemble Bolkardagi Union rather than Alanya and Geyikdagi Unions.
The age of the Keban metamorphites could be dated from Middle-Devonian to Jurassic or even Early Cretaceous.