intrusive ice
Link: http://w3id.org/permafrost/v/ipaglossary/t0180
Within: IPA Permafrost Glossary
Definition: Ice formed from water injected into soils or rocks (see Figure 10c).
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intrusive ice
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| Comment |
Freezing of injected water will normally lift the ground above it, thereby producing topographic forms somewhat resembling those of igneous intrusions in rocks. Thus, a tabular mass of intrusive ice is analogous to a sill or a dyke (see ice vein) whereas the domed form is analogous to a laccolith (see frost blister, pingo). Use of terms such as "sill ice" or "hydrolaccolith," however, is not recommended. Intrusive ice may develop in porous unconsolidated sediments and in jointed or fractured bedrock. Fractures may become enlarged by hydraulic fracturing or frost wedging processes. For the greatest effect, water must become trapped in the joints or fractures and be subjected to relatively rapid freezing.
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| dcterms:source |
https://doi.org/10.4224/20386561
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injection ice
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