Here is a very interesting Boxonia pertaknurra stromatolite from the Precambrian of Australia. Authorities believe that stromatolites were formed by masses of green or blue-green algae, or''cyanobacteria''. This stromatolite is estimated to be about 800 million years old!
These closely packed stromatolites are believed to have been deposited in conditions that subjected them to intermittent periods of submergence, possibly seasonal in nature. This chunk of stromatolite has been sliced with a diamond saw and highly polished on one side for optimal display.
The cluster pattern of the stromatolites is easily seen, and the different shades of mineral replacement are nicely showcased. This is a very distinct stromatolite specimen from an unusual location.
The item "EXTINCTIONS- RARE, DETAILED BOXONIA STROMATOLITE FOSSIL- 800 MILLION YEARS OLD" is in sale since Sunday, August 23, 2020. This item is in the category "Collectibles\Rocks, Fossils & Minerals\Fossils\Vertebrates\Amphibian, Reptile & Dinosaur". The seller is "extinctions" and is located in Lancaster, Pennsylvania.This item can be shipped worldwide.