Sandstone columns

There is a hill north of town that consists mainly of ordinary sandstone and sandstone columns. They are not the usual black or grey columns, so I was confused. In my very brief reading about basalt columns, it seems that sandstone columns could be formed by flood, rather than volcanic activity, although the area has had a few million years of both volcanic activity and deep water coverage (now the much smaller Klamath Lake). Any explanation by those more informed than I would be appreciated!

Edit: Later, I found this... www.b14643.de/Sahara/Sandstone-Columns/index.htm Fascinating, but I don't understand it well. It seems these really are sandstone, do form in proximity to volcanic activity, are found around the world, but are rare.