Dilek Peninsula-Büyük Menderes Delta National Park Aegean Region in general. The peninsula was shaped into its current form over several geological eras with the tectonic merging of Paleozoic schist formations, Mesozoic limestone and marble deposits, and finally the accretion of large clays and other sediments during the Neogene period. This is partly because of Turkey's unstable fault block terrain, and because of the close proximity of the Anatolian-Aegean plate boundary, which generates massifs of mountains all across western Turkey. This includes the peninsula and the mountains surrounding the Büyük Menderes River, known collectively as the Menderes Massif. The peninsula is highly mountainous, with most of its
Datça Peninsula small peninsula which is nearly an island, connected to the mainland by a low, 100m-wide spit of land; in antiquity it was a man-made causeway. The ancient name of the island was Triopion, after Triopas, the legendary founder of Knidos. The peninsula's eastern end is Bencik Cove, about 1.5 km in length and sometimes referred to as a fjord on the basis of local scales, and at the end of its indentation is the narrow isthmus where Datça Peninsula joins the Anatolian mainland is found. This point is a natural curiosity which offers a wide view of the two gulfs