Quarry in the basaltic lava flow (close to the Hron River) of Putikov vršok, the youngest (pleistocene) volcano in Western Carpathians.
<a href="//commons.wikimedia.org/wiki/User:Pelex" title="User:Pelex">Ondrej Pelech</a>
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>