Name:
Collenia sp. Age: Precambrian Formation: Chocolay Group (Kona Dolomite) Location: Marquette County, Michigan Size: Slab is 6.6 inches across This specimen is not for sale Click here for similar specimens that are for sale
This is a fabulous stromatolite specimen. This is Collenia sp. from the Precambrian of Michigan. Authorities believe that stromatolites were formed by masses of green or blue-green algae, or ''cyanobacteria''. This stromatolite is estimated to be 2.3 to 2.5 billion years old! This striking slice of stromatolite has been highly polished on one side for optimal display. The gorgeous deep red coloration of the mineral replacement and the unique layering pattern make for a stunning exhibit. This is a beautiful example of a Kona stromatolite from Michigan.