Rock formation at <a href="https://en.wikipedia.org/wiki/Mushroom_Rock_State_Park" class="extiw" title="w:Mushroom Rock State Park">Mushroom Rock State Park</a>, Kansas. Original caption: Pulpit rock, near Alum Creek south of Carneiro, a hard mass of Dakota sandstone which has resisted erosion than the underlying softer bed that forms its pedestal. Ellsworth County, Kansas.
<a href="https://en.wikipedia.org/wiki/Nelson_Horatio_Darton" class="extiw" title="w:Nelson Horatio Darton">Nelson Horatio Darton</a>, USGS
<a rel="nofollow" class="external free" href="https://libraryphoto.cr.usgs.gov">http://libraryphoto.cr.usgs.gov</a>