Unique Eocene Stromatolites from Green River Formation

Chlorellopsis sp.

Geological Time: Middle Eocene (~50 m.y.a.)

Size (25.4 mm = 1 inch): 90 mm by 65 mm by 25 mm (maximum)

Fossil Site: Green River Formation, Tipton Shale Member, Green River Basin, Wyoming

Code: ST033

Price: Sold

Eocene StromatolitesDescription: This is a stromatolite as found in its natural un-cut form. The distinctive green coloration may be the result of a high level of copper. A most interesting feature of this specimen is that it has been naturally polished by wind and send – in essence sandblasted by the elements. An additional unique feature is that this example is inordinately young for stromatolites. This particular structure, given the name Chlorellopsis, 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.

Stromatolites 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.

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