Kilianstollen (Grube Friederike) Tuff in unterkarbonischen Lyditen in steiler Lagerung
<a href="//commons.wikimedia.org/wiki/User:Geolina163" title="User:Geolina163">Geolina163</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>