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added by Kasia June 27, 2012, 7:55 a.m.
What is the maximum depth of permafrost?
1,5 m
15 m
150 m
1500 m
In areas of harsh winters the depth of the permafrost can be as much as 1,493 m (4,898 ft) in the northern Lena and Yana River basins. The overlying active layer that seasonally thaws is just 0.6–4 m (2.0–13 ft) thick.
Kasia
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Very interesting!
reach: rather globalArcticgeologynaturepermafrostRussiaSiberiasoil

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