Which word is used to describe any rock or soil material that has remained below zero degrees centigrade continuously for more than two years?
Alpine permafrost Sporadic permafrost zone Sporadic permafrost Discontinuous permafrost Permafrost soil Discontinuous Permafrost Zone Permafrost Continuous permafrost zone PERMAFROST Discontinuous permafrost zone Widespread permafrost zone Cryotic soil Continuous permafrost Widespread Permafrost Zone
discontinuous permafrost discontinuous permafrost zone sporadic permafrost sporadic permafrost zone widespread permafrost zone cryotic soil permafrost permafrost soil continuous permafrost continuous permafrost zone alpine permafrost
permafrost
WikipediaEntity
PERMAFROST