This 5-meter high chimney must have taken many years to grow this large from sulfide minerals precipitated out of the hot vent fluid. There is no indication of any new lava and the animal community at the base of the chimney appears to be many years old and well-established, because the tubeworms are large and there are many different vent species present.

-> Old lava, uncollapsed

-> Old hydrothermal vent

-> Old vent biological community