composite wedge
Link: http://w3id.org/permafrost/v/ipaglossary/t0041
Within: IPA Permafrost Glossary
Definition: A wedge showing evidence of both primary and secondary filling.
| Term |
fente en coin à remplissage composé
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composite wedge en |
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| Comment |
When used with reference to thermal contraction crack phenomena in permafrost, it describes a wedge filled by a combination of ice and soil (usually sand). The term is also frequently used to describe Pleistocene sand wedges and ice-wedge casts. Typically, composite wedges are filled with material very similar in structure and texture to sands in a typical fissure of primary filling (i.e., sand wedge). However, there may be inclusions of material from the fissure walls and some distortion of the adjacent sediments bordering the wedge, reflecting the presence of ice in the original fill material.
en
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| dcterms:source |
https://doi.org/10.4224/20386561
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