Concept information
Preferred term
black crust
Type
-
owl:NamedIndividual
Definition
- Kind of crust developing generally on areas protected against direct rainfall or water runoff in urban environment. Black crusts usually adhere firmly to the substrate. They are composed mainly of particles from the atmosphere, trapped into a gypsum (CaSO4.2H2O). matrix.. [ICOMOS-ISCS] (en)
Broader concept
- crust (en)
In other languages
-
černá krusta
Czech
-
croûte noire
French
-
German
URI
https://hist-arch-vocab.org/bvha#c_80cb42d9
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