Palaeocastor - Daemonelix stock image
By Julio Lacerda
"Devil's corkscrew" is the name given to the fossilized burrows dug by the extinct beaver Palaeocastor. The strangely-shaped burrows were previously believed to be freshwater sponges or some kind of vegetation.
This is a Royalty Free image suitable for every educational, editorial, or commercial purposes.