What depths can permafrost extend in Russia and the republics?

In Russia and the republics of the former Soviet Union, permafrost can extend to depths of over 1,500 meters (4,900 feet). The deepest permafrost on Earth is found in Siberia, where it can reach depths of up to 1,650 meters (5,400 feet). This permafrost is a relic of the last ice age, when glaciers covered much of the region. As the glaciers retreated, the ground beneath them remained frozen, and it has remained frozen ever since.

Permafrost is a major factor in the environment of Russia and the republics. It affects the way the land is used, the types of plants and animals that can live there, and even the climate. Permafrost can also pose a hazard to human activity, as it can cause buildings and roads to collapse.