Name:
Banded Iron Stromatolite
Age: Precambrian
Formation: Stromatolite Beds
Location: Jackson County, Wisconsin
Size: Stromatolite is 7.2 inches across
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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 extremely colorful slab has been highly polished on one side for optimal display. The two-toned, layered mineral replacement is clearly defined and makes for a unique presentation. This is an attractive example of this extremely unusual stromatolite from the Midwest.
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