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Natural monuments Moravian

Natural Monument Razovské Tuffs 1

Basic information

Natural Monument Razovské Tuffs is situated on the bank of Slezská Harta Damn. Local tuffs were created by volcanic activity of a nearby extinct volcano called Velký Roudný (the best preserved stratovolcano in Moravia). The site was declared a natural monument in the area of 10.44 ha in 1997.

Subject of protection

An abandoned tuff quarry is the subject of protection here. Since middle ages it has served as a supply for building material for historic buildings far and wide.


The creation of volcanosedimentary rock in Razov is connected to volcanic activity of Velký Roudný. The eruption of Velký Roudný and the stream of lava in the area of Chřibský les resulted in filling the early Pleistocene Morava River bed in the distance of several kilometres. Consequently, the river level upheaved and a lake was created. According to the radiometric measurements of a basalt sample taken from Chřibský les we date the vulcanosedimentary rock back to lower Pleistocene, i.e. about 1.4 million years ago.

Razovské tufity 1

Razovské tufity 1

Razovské tufity 2

Razovské tufity 2

Useful information


Krajský úřad Moravskoslezského kraje, odbor životního prostředí a zemědělství 28. října 117, 702 18 Ostrava www.kr-moravskoslezsky.cz tel.: +420 595 622 297

GPS position

N 49° 54.811', E 17° 31.579'



Krajský úřad Moravskoslezského kraje
Odbor životního prostředí a zemědělství
28. října 117, Ostrava
Tel.:+420 595 622 297