Baikal rift zone  search
BTCommonwealth of Independent States
 .Russian Federation
 ..Baikal rift zone
BTAsia
 .Baikal rift zone
RTIrkutsk Russian Federation
 Buryat Russian Federation
 Lake Baikal
 Siberia
SNS central Siberia. This term has multiple hierarchies. Added to Thesaurus in 1981.