Permafrost is defined as rock or soil with ice that stays frozen for two or more years. It usually lies below an “active layer” of soil that freezes and thaws every year.
Definition source: United States Environmental Protection Agency
Permafrost is defined as rock or soil with ice that stays frozen for two or more years. It usually lies below an “active layer” of soil that freezes and thaws every year.
Definition source: United States Environmental Protection Agency
