Role of Cyanobacteria in Producing Stromatolites
the basic organism-sediment interaction that produces stromatolites and other algal-laminated sediments are when communities of cyanobacteria form organic films of mainly mucilaginous material
they effectively stabilize sedimentary surfaces by trapping and binding clastic particles of sediment.
the "algal mats" generally stabilize the sediment-water interface.
scanning electron micrograph of a microbial mat, showing filaments. (Jannasch, 1984)
Cyanobacterial filaments trapping sediment particles (www.dna-photo-gene.com)