Owing to their extreme climatic requirements, gelisol fossils are confined to the few periods of extensive continental glaciation-the earliest being 900 million years ago in the Neoproterozoic.
3.
The word " gelisol " comes from the Latin " gelare " meaning " to freeze ", a reference to the process of cryoturbation that occurs from the alternating thawing and freezing characteristic of gelisols.
मोबाइल