I think I found a new favorite rock. You do have favorite rocks, don’t you?

I’ve been hiking in this canyon for years and never saw this rock until yesterday. It’s about three feet (1m) across – not inconspicuous.

The flat surface is quite smooth and striped with some ferrous compound. The concretions are, of course, raised, but not damaged. That’s all I know.

Sierra county, New Mexico, USA.