Red algae grows in ice and snow. Maybe geothermal energy makes it grow faster and melts the ice loaded with the algae torun into the river. There's always water where the ice meets the ground because of pressure and friction.
Red algae grows in ice and snow. Maybe geothermal energy makes it grow faster and melts the ice loaded with the algae torun into the river. There's always water where the ice meets the ground because of pressure and friction.