Armutlu Peninsula density in the mountains at the inner peninsula is low, where there are only small villages. Both gulfs at the north and the south are actually on two active tectonic fault lines. The entire peninsula was hit by the İzmit earthquake on August 17, 1999 that occurred along the western portion of the North Anatolian Fault Zone. Armutlu Peninsula Armutlu Peninsula () is a peninsula extending westward into Marmara Sea in the Anatolian section of Turkey. In addition to Yalova Province, parts of Kocaeli Province and Bursa Province are on the peninsula. Armutlu Peninsula is between Gulf of Izmit in
Anatolian languages as languages such as Mysian, Cilician, and Pamphylian, which are too poorly attested to construe a relationship with Anatolian. The Anatolian branch is generally considered the earliest to split from the Proto-Indo-European language, from a stage referred to either as Indo-Hittite or "Middle PIE"; typically a date in the mid-4th millennium BC is assumed. Under the Kurgan hypothesis, there are two possibilities for how the early Anatolian speakers could have reached Anatolia: from the north via the Caucasus, and from the west, via the Balkans, the latter of which is considered somewhat more likely by Mallory (1989), Steiner (1990) and