Stromatolite Kinneyia simulans formed by algae mats of cyanobacteria. The layers and structures are visible in the rock. The stromatolite was formed in the Precambrian period and is 2.4 to 2.6 bilion years old from the beginning of life on Earth. Found in Mc. Rea Shale, Hammersly Range, Western Australia.
You will receive ONE specimen similar to the ones on the photo.