DCHP-1 Online
dry permafrost 
See quote.
See also: permafrost
- 1957 Recent tests have shown that there is a condition known as "dry permafrost"--that is, permanently frozen soil or gravel containing no moisture.
- 1957 Recent tests have shown that there is a condition known as "dry permafrost"--that is, permanently frozen soil or gravel containing no moisture.