The volcanic eruption of Hasandagi led to tectonic movements that left the surface of the region covered with a layer of volcanic rock. The same volcanic activity led to pressure and heat being put upon the limestone causing it to crack and create naturally spouting springs of hot water, these can be seen at the Ziga Thermal Springs between Ihlara and Yaprakhisar. The structural characteristics of the region due to volcanic eruption produced tufa outcrops which were moulded by wind, erosion and other natural phenomena and created the strange and colorful Fairy Chimneys that are also encountered at Selime and Yaprakhisar. The tectonic movoments produced tufa rock that in some places is soft and in others is coloured grey, green and brown. Huge areas of crumbling rock completely covered the area in its debris. The Ihlara valley alogside the Melendiz River is a result of this disintegration that created a canyon with a deep base. The fast flowing river is in places between 100 and 200 m deep and it divides the valley into two; it continues towards Aksaray with the name Ulunmak until reaches Tuz Golu (Salt Lake).
Aksaray Province of Cappadocia region was an important religious centre in Christianity’s very earliest days. Founders of orders like Basilof kayseri and Greegory of Nazianos lived here in the 4th century. A different set of monastic rules than the system used in Egypt ad Syria was determined here. Although the monks in Egypt and Syria cut themselves off from relationships with the wordly things the monks under Basil and Gregory did not. The birthplace for this concept was Belisirma. Gregory, offering a new explanation for the Holy Trinity, brought about a debate concering the divinity of Christ. His ideas prevailed at the Council of Iznik. Thus an innovator became a saint for the the rock region of Belisirma, Ihlara and Gelveri where Gregory lived. With the defensive castles of Mount Hasan providing defence against Arab invasions the churces were able to continue in peaceful worship.
The Ihlara Valley has protected these rock-cut dwellings ad churhes with frescoes and they come down to us a unique historical treasury. These frescoed churches and dwellings easily carved into rock from the early years of Christianity are scattered all along the way from Ihlara to Selime through the Ihlara valley.
Ihlara valley has been formed at an approximate depth of 150 due that the erosion made by Melendiz river coming from the mountains of Melendiz to the volcanic rocks. Due that the richness of the watering possibility and its hidden form and easily to hide structure it was the first settlement place of the first Christians escaping from the Roman soldiers In the Ihlara Valley there are hundreds of antic churches caved in the volcanic rocks. The most known Ihlara valley churches are Agacalti Church with cross plan, Sümbüllü Church, Pürenliseki Church, Kokar Church, Yilanli Church, Karagedik Church, Kirkdamatli Church, Direkli Church, Ala Church, Kemerli Church and Egritas Church.