Thaw depth Thaw depth In soil science, the thaw depth or thaw line is the instantaneous level down to which the soil has warmed to zero degrees celcius. The active layer thickness is the maximum thaw depth over a period of two years. The layer of soil over the thaw depth is called the active layer, while the soil below is called permafrost. The term frost front refers to the varying position of the thaw line during the periods of freezing/thawing. The knowledge of the thaw depth is important for the two major reasons: its influence on the ecology and on construction
Nine Below Zero Nine Below Zero Nine Below Zero are an English blues band, who have a cult following throughout Europe, and were most popular during the period 1980–1982. The band was originally formed in South London in 1977, by guitarist and lead vocalist Dennis Greaves. Taking bassist Peter Clark with him, they recruited Kenny Bradley on drums, and vocalist and harmonica player Mark Feltham. They originally called themselves "Stan's Blues Band", and for two years built up a local following in London clubs. In 1979, while playing at The Thomas A'Beckett pub in the Old Kent Road they accepted an offer from