Fossil or Pseudofossil? I found these rocks in the Oregon Coast Range many years ago and have always wondered whether the interesting image was a pseudofossil or an actual fossil.  If it's a pseudofossil, any ideas on how it would form? If it's a fossil, what on earth is it? The image measures about 37 mm at its widest point.

Thanks for any insight you can provide!
It's been identified by a paleoichnologist as most probably a new species of Paleodictyon.