PPT Slide

Examples of separate subsurface bio-activity

“Black smokers” on the ocean floor. Hydrothermal vents. Geothermal & geochemical energy. Oxidation of reduced species.

Fermentive-Methanogenic-Sulfate-reducing-consortia in marine sediments (really separate?)

Bacteria living deep underground near sources of geochemical produced H2 + CO2 (basalt & granitic aquifers)

Bacteria in non-polluted & polluted aquifers (groundwater systems), but those are most probably not independent