Thaw unconformity

Alternative definitions (3), class: vernacular (0)
Term: Thaw unconformity
Definition: A boundary sometimes identified in perennially Frozen Ground, representing the base of a Relict Active Layer, as well as the corresponding earlier Permafrost Table. A Thaw Unconformity may be recognized by differences in Ice Contents, stable isotope contents, and heavy mineral and pollen assemblages above and below the unconformity.
Created 2022.03.08
Last Modified 2023.03.27
Contributed by GCW Glossary