Crust

File:Image3 802477.jpg

MFA Acc. #: 87.446

Description

A hard covering or coat on the surface of another material. In minerals, a crust on one mineral may be redeposited over another. Weathering may oxidize or deteriorate the surface of some materials forming a hard, sometimes protective, crust. A crust may also be formed by pollution. See black crust, gypsum crust, gypcrete, and caliche.

MFA Acc. #: 84.19

Synonyms and Related Terms

crusting; incrustation; encrustation; black crust; gypsum crust; caliche; gypcrete

Additional Images

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  Black crust

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  Black crust

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  Salt crust

Authority

• Dictionary of Building Preservation, Ward Bucher, ed., John Wiley & Sons, Inc., New York City, 1996

• Encyclopedia Britannica, http://www.britannica.com Comment: "crust" Encyclopædia Britannica Premium Service. [Accessed 18 Oct. 2005].

• Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Crust (accessed Jan 6, 2006)

• Art and Architecture Thesaurus Online, http://www.getty.edu/research/tools/vocabulary/aat/, J. Paul Getty Trust, Los Angeles, 2000