Stromatolites are club-shaped structures formed by a slow buildup of microbial
mats trapping ooid sands. These form in high energy channels where migrating
sand dunes and chemical precipitation of carbonate cement are dominant seafloor
processes.
Image ID: nur03511, Voyage To Inner Space - Exploring the Seas With NOAA Collect Location: Bahama Islands Credit: OAR/National Undersea Research Program (NURP)
