The best examples of bacteriogenic mineralization in the geologic record came from the Precambrian Gunflint Iron Formation in Canada. About 250 minerals are now considered to be biomineralization product and the biomass may control their environmental behavior. The bacteria present in almost all places, such as soils, lakes, acid mine drainage, cement concrete, sludge and deep-sea sediments at temperatures from freezing to hundreds degree cen-tigrades and wide range of pH. Recent examples of bacteriogenic mineralization drawn from areas impacted by industrial activity give the evidences that bacteria can support high rate of mineral precipitation. TEM photographs show that bacterial cell wall is essentially occupied by crystalline materials. Interaction between in-organic physical processes and the biological processes occurs at the interfacial of bacteria and solution. Extensive microbial activity in response to environmental change are the most sensitive factors modyfying the surface of our planet.
