Question: stromatolites found in western australia are are produced by which organism
Answer: Stromatolites ( / stroʊˈmætəlaɪts , strə - / ) or stromatoliths ( from Greek στρῶμα strōma `` layer , stratum '' ( GEN στρώματος strōmatos ) , and λίθος lithos `` rock '' ) are layered mounds , columns , and sheet - like sedimentary rocks that were originally formed by the growth of layer upon layer of cyanobacteria , a single - celled photosynthesizing microbe .