hydrothermal vent  search
hydrothermal vents  search
NTblack smokers
UFhydrothermal chimneys
RTbottom features
 ocean floors
 thermophilic taxa
 hydrothermal conditions
 chimneys
 vents
 plumes
SNBefore 1993, also search vents or chimneys in conjunction with hydrothermal conditions. Also index ocean floors. Added to Thesaurus in 1993.