The Newburgh shale fossils

The Burgess Shale Formation is a fossil-bearing deposit in the Canadian Rockies of British Columbia. It is justifiably famous for the exceptional preservation of the soft parts of of truly ancient animals, such as Hallucigenia,  from the Middle Cambrian (508 million years BP).

The Newburgh-on-Ythan shale-beds are much less well known but contain beautiful fossils from the same period. This is Reactant jeweler , an enigmatic animal with bizarre features including a single spiral appendage which may have been used to propel it through the shallow tropical seas in which it lived. What do you reckon?.