The images of the overlapping rings (?) remind me of machaeridians. The
age is right... Annette E.S. Hogstrom really should take a look at
these... The last I knew, she is at University of Uppsala,
Anette.Hogstrom@pal.uu.se.
Best of luck,
Dr. Raymond F. Gildner
Department of Geosciences
Indiana University-Purdue University Ft. Wayne
gildnerr@ipfw.edu