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Stromatolite Age: Precambrian Formation: Bad River Dolomite Location: Bayfield County, Wisconsin Size: Slab is 2.5'' X 5.3'' This specimen is not for sale Click here for similar specimens that are for sale
This is a very pretty slab of stromatolite from the Precambrian of Wisconsin. Authorities believe that stromatolites were formed by masses of green or blue-green algae. This thick slab has been highly polished on one side. The unique greenish coloration of this stromatolite makes for a striking display. This is a very attractive slice of an extremely old stromatolite.