Unique Eocene Stromatolites from Green River Formation
Time: Middle Eocene (50 million years ago)
mm = 1 inch): 85 mm by 100 mm by 40 mm (maximum)
Green River Formation, Green River Basin, Wyoming
This is a stromatolite as found in its natural un-cut form with
the exception of one side that has been cut and polished to show
the distinctive stromatolitic structure. A most unique feature
is that this example is inordinately young for stromatolites.
This particular structure, given the name Chlorelloipsis, while
presumed to have been the result of algal biological origin,
may have actually been the result of multiple and competing prokaryotic
and eukaryotic organisms.
have persisted to the modern day in such places as Shark Bay,
Australia where they continue their billions of years old lifestyle.
While this piece would make a fine present for any natural history
buff, anyone who appreciates art would also be glad to get thus
wonderful specimen as a gift.