minerogenic palsa
Link: http://w3id.org/permafrost/v/ipaglossary/t0208
Within: IPA Permafrost Glossary
Definition: A palsa in which the frozen core extends below the peat into underlying mineral material.
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minerogenic palsa
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| Comment |
Palsas were originally regarded as having developed completely in peat (Fries and Bergström, 1910). Later it was found that such true palsas are relatively rare, and that the frozen core in most palsa-like landforms extends down into mineral layers (Lundqvist, 1962; Lundqvist and Mattsson, 1965; Wramner, 1965). Fosgren (1966) and Åhman (1977) also reported "palsas" developed entirely in mineral soil, and they called both types "minerogenic palsas". Harris (1993) described a sequence of stages in the development of palsa-like mounds developed entirely in mineral soils in the Fox Lake area (Yukon), for which he proposed the name "lithalsa". He suggested a new name was needed, because the heat- and moisture-transport processes in mineral soils differ from those in peat (Brown, 1970a).
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| dcterms:source |
https://doi.org/10.4224/20386561
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