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desert varnish (<coating by composition or origin>, coating (material), ... Materials (hierarchy name)) |
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Note: Thin mineral coating composed of iron and manganese oxides deposited on rock surfaces in desert areas. The reddish brown or black desert varnish layers form as moisture evaporates leaving behind dissolved mineral residue which wind abrasion polishes over the course of centuries. Some petroglyphs are images incised in desert varnish, a technique which exposes the lighter stone beneath.
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| Terms: |
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| desert varnish (preferred,C,U,English-P,D,U,N)
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| woestijnvernis (C,U,Dutch-P,D,U,U)
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Facet/Hierarchy Code: D.DE |
Hierarchical Position:
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Materials Facet |
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.... Materials (hierarchy name) (G) |
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........ materials (substances) (G) |
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............ <materials by function> (G) |
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................ coating (material) (G) |
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.................... <coating by composition or origin> (G) |
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........................ desert varnish (G) |
Additional Parents:
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Physical Attributes Facet |
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.... Conditions and Effects (hierarchy name) (G) |
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........ <conditions and effects by specific type> (G) |
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............ <conditions and effects for landscape> (G) |
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................ desert varnish (G) |
Additional Notes: |
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| Dutch ..... Dunne mineralenlaag die bestaat uit ijzer- en mangaanoxiden en die is afgezet op rotsoppervlakken in woestijngebieden. De roodbruine of zwarte woestijnvernislagen ontstaan wanneer vocht verdampt en er opgelost mineraalresidu achterblijft, dat in de loop der eeuwen door de wind glad wordt geschuurd. Sommige petrogliefen zijn afbeeldingen die in woestijnvernis zijn gekerfd, waardoor de lichter gekleurde steen eronder zichtbaar wordt. |
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Related concepts: |
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| composed of .... |
iron oxide (compound) |
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(compounds (materials), <materials by chemical form>, ... Materials (hierarchy name)) [300387477] |
| composed of .... |
manganese oxide |
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(manganese violet (pigment), inorganic violet pigment, ... Materials (hierarchy name)) [300238624] |
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Sources and Contributors: |
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