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Algae in runoff channels
Algae
Algae colors in Lower Geyser Basin
Algae
Thermophyllic bacteria
Bacterium
Thermophyllic bacteria
Bacterium
Thermophyllic bacteria
Bacterium
Thermal algae
Algae
Thermal algae
Algae
Thermal algae
Algae
Bacteria head, Cedar Tree Spring - Mammoth Hot Springs
Bacterium
Green algae flow in Norris Geyser Basin
Algae
Algae in thermal water
Algae
Algae in thermal water
Algae
Algae in thermal water
Algae
Algae in thermal water
Algae
Algae in thermal water
Algae
Algae in thermal water
Algae
Algae in thermal water
Algae
Filamentous bacteria at Mammoth Hot Springs
Bacterium
Algae & filamentous bacteria at Mammoth Hot Springs
Algae, Bacterium
Filamentous algae in run off channel in the Old Faithful area
Algae
Algae growth in hot spring in the Old Faithful area
Algae
Algae near Pump Geyser
Algae
Algae run off in Black Sand Basin
Algae
Algae flow patterns
Algae
Thermophilic algae & sinter detail
Algae
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