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Banded Iron Stromatolite Age: Precambrian Formation: Stromatolite Beds Location: Jackson County, Wisconsin Size: Specimen is about 5'' X 7" This specimen is not for sale Click here for similar specimens that are for sale
Here is a very distinct Banded Iron Stromatolite specimen from the Precambrian of Wisconsin. Authorities believe that stromatolites were formed by masses of green or blue-green algae, or ''cyanobacteria''. This particular stromatolite has been dated to 2.73 billion years old! This large slab has been highly polished on one side for optimal display. The layered mineral replacement is clearly defined and makes for a unique presentation. This is a fine example of this extremely unusual stromatolite from the Midwest.