Location and Extraction
Oltu stone, sometimes called also "Erzurum stone", is principally mined in the villages northeast of Oltu town, around Tutlu Dağı (Yasak Dağ) as well as in Alatarla, Hankaskışla and Çataksu villages. The mountainous, rough region with steep slopes is 1,600–1,800 m (5,200–5,900 ft) high.
Oltu stone beds are formed when fossilized trees are subject to diastrophism resulting in folding. Beds of this organic substance are 70–80 cm (28–31 in) in thickness. Extraction is done by digging narrow tunnels and shafts below ground. There are around 600 quarries in the region.
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