has part cryoconite deposit cryoconite hole A vertical thaw hole within an ice mass, formed as a result of ice melt associated with local temperature increases, due to increased absorption of solar radiation by cryoconite deposits. The general semantics of depressions are still to be worked out see https://github.com/EnvironmentOntology/envo/issues/486 envoPolar http://orcid.org/0000-0002-3410-4655 cryoconite holes This class doesn't refer to the site but instead the depression or hole and therefore the adjacency to the cryoconite itself. thaw hole