<p>An anticlinal at Bjerkaas, Norway, a part of the Oslo Region. 
</p>
My own photograph, Kjetil Lenes.
No machine-readable author provided. <a href="//commons.wikimedia.org/wiki/User:Ekko" title="User:Ekko">Ekko</a> assumed (based on copyright claims).
CC BY 2.5
No machine-readable source provided. Own work assumed (based on copyright claims).