Chapel from 1515 near <a href="https://en.wikipedia.org/wiki/D%C3%B6rzbach" class="extiw" title="en:Dörzbach">Dörzbach</a>,  next to river <a href="https://en.wikipedia.org/wiki/Jagst" class="extiw" title="en:Jagst">Jagst</a>, Germany.<br>
10m high petrified „Calcereous Tuff" deposit (carbonate rock). Use as quarry disclosed several primary caves. The <a href="https://en.wikipedia.org/wiki/Karst_topography" class="extiw" title="en:Karst topography">Karst springs</a> sedimenting since <a href="https://en.wikipedia.org/wiki/Holocene" class="extiw" title="en:Holocene">Holocene</a> period are still active.
<a href="//commons.wikimedia.org/wiki/User:BerndH" title="User:BerndH">Bernd Haynold</a>
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>